The content property of `Message` model includes variants that do not exist

[joseharriaga]

In the Message model of the Conversations API, the following variants of the "content" property do not exist: "TextContent", "SummaryTextContent", "ReasoningTextContent", "ComputerScreenshotContent".

Or conversely, the only valid variants are: "InputTextContent", "InputImageContent", "InputFileContent", "OutputTextContent", and "RefusalContent".