Property or indexer 'IOpenApiMediaType.Example' cannot be assigned to -- it is read only

[AdaskoTheBeAsT]

Describe the bug
When I am using new Microsoft.OpenApi I receive

Property or indexer 'IOpenApiMediaType.Example' cannot be assigned to -- it is read only
obj\Debug\net10.0\Microsoft.AspNetCore.OpenApi.SourceGenerators\Microsoft.AspNetCore.OpenApi.SourceGenerators.XmlCommentGenerator\OpenApiXmlCommentSupport.generated.cs	503	

OpenApi File To Reproduce
Add the OpenApi file you're using or a link to it as well as the steps to reproduce the current behavior.

Expected behavior
It should work without problems

Screenshots/Code Snippets

taken from autogenerated OpenApiXmlCommentSupport.generated.cs

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.AspNetCore.OpenApi.SourceGenerators, Version=10.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60", "10.0.0.0")]
file class XmlCommentOperationTransformer : IOpenApiOperationTransformer
{
    public Task TransformAsync(OpenApiOperation operation, OpenApiOperationTransformerContext context, CancellationToken cancellationToken)
    {
        var methodInfo = context.Description.ActionDescriptor is ControllerActionDescriptor controllerActionDescriptor
            ? controllerActionDescriptor.MethodInfo
            : context.Description.ActionDescriptor.EndpointMetadata.OfType<MethodInfo>().SingleOrDefault();

        if (methodInfo is null)
        {
            return Task.CompletedTask;
        }
        if (XmlCommentCache.Cache.TryGetValue(DocumentationCommentIdHelper.NormalizeDocId(methodInfo.CreateDocumentationId()), out var methodComment))
        {
            if (methodComment.Summary is { } summary)
            {
                operation.Summary = summary;
            }
            if (methodComment.Description is { } description)
            {
                operation.Description = description;
            }
            if (methodComment.Remarks is { } remarks)
            {
                operation.Description = remarks;
            }
            if (methodComment.Parameters is { Count: > 0})
            {
                foreach (var parameterComment in methodComment.Parameters)
                {
                    var parameterInfo = methodInfo.GetParameters().SingleOrDefault(info => info.Name == parameterComment.Name);
                    var operationParameter = operation.Parameters?.SingleOrDefault(parameter => parameter.Name == parameterComment.Name);
                    if (operationParameter is not null)
                    {
                        var targetOperationParameter = UnwrapOpenApiParameter(operationParameter);
                        targetOperationParameter.Description = parameterComment.Description;
                        if (parameterComment.Example is { } jsonString)
                        {
                            targetOperationParameter.Example = jsonString.Parse();
                        }
                        targetOperationParameter.Deprecated = parameterComment.Deprecated;
                    }
                    else
                    {
                        var requestBody = operation.RequestBody;
                        if (requestBody is not null)
                        {
                            requestBody.Description = parameterComment.Description;
                            if (parameterComment.Example is { } jsonString)
                            {
                                var content = requestBody?.Content?.Values;
                                if (content is null)
                                {
                                    continue;
                                }
                                foreach (var mediaType in content)
                                {
                                    // here is error
                                    mediaType.Example = jsonString.Parse();
                                }
                            }
                        }
                    }
                }
            }
            // Applies `<returns>` on XML comments for operation with single response value.
            if (methodComment.Returns is { } returns && operation.Responses is { Count: 1 })
            {
                var response = operation.Responses.First();
                response.Value.Description = returns;
            }
            // Applies `<response>` on XML comments for operation with multiple response values.
            if (methodComment.Responses is { Count: > 0} && operation.Responses is { Count: > 0 })
            {
                foreach (var response in operation.Responses)
                {
                    var responseComment = methodComment.Responses.SingleOrDefault(xmlResponse => xmlResponse.Code == response.Key);
                    if (responseComment is not null)
                    {
                        response.Value.Description = responseComment.Description;
                    }
                }
            }
        }
        foreach (var parameterDescription in context.Description.ParameterDescriptions)
        {
            var metadata = parameterDescription.ModelMetadata;
            if (metadata.MetadataKind == ModelMetadataKind.Property
                && metadata.ContainerType is { } containerType
                && metadata.PropertyName is { } propertyName)
            {
                var propertyDocId = DocumentationCommentIdHelper.CreateDocumentationId(containerType, propertyName);
                if (XmlCommentCache.Cache.TryGetValue(DocumentationCommentIdHelper.NormalizeDocId(propertyDocId), out var propertyComment))
                {
                    var parameter = operation.Parameters?.SingleOrDefault(p => p.Name == metadata.Name);
                    var description = propertyComment.Summary;
                    if (!string.IsNullOrEmpty(description) && !string.IsNullOrEmpty(propertyComment.Value))
                    {
                        description = $"{description}\n{propertyComment.Value}";
                    }
                    else if (string.IsNullOrEmpty(description))
                    {
                        description = propertyComment.Value;
                    }
                    if (parameter is null)
                    {
                        if (operation.RequestBody is not null)
                        {
                            operation.RequestBody.Description = description;
                            if (propertyComment.Examples?.FirstOrDefault() is { } jsonString)
                            {
                                var content = operation.RequestBody.Content?.Values;
                                if (content is null)
                                {
                                    continue;
                                }
                                var parsedExample = jsonString.Parse();
                                foreach (var mediaType in content)
                                {
                                    // here is error
                                    mediaType.Example = parsedExample;
                                }
                            }
                        }
                        continue;
                    }
                    var targetOperationParameter = UnwrapOpenApiParameter(parameter);
                    if (targetOperationParameter is not null)
                    {
                        targetOperationParameter.Description = description;
                        if (propertyComment.Examples?.FirstOrDefault() is { } jsonString)
                        {
                            targetOperationParameter.Example = jsonString.Parse();
                        }
                    }
                }
            }
        }

        return Task.CompletedTask;
    }

Additional context