[WebToolsE2E][Aspire][Document]Some more updates are needed to "Use .NET Aspire messaging components in ASP.NET Core" instructions using VS with aspire

[v-yuwzh]

Describe the issue or suggestion

Issue description
In "Use .NET Aspire messaging components in ASP.NET Core" doc, we need to make some updates to the instructions for Preview 6.

Issue 1: For Add the .NET Aspire component to the API section, document lets add below code,

after add this code "builder.AddAzureServiceBus("serviceBusConnection");" will meet below error. change to this code "builder.AddAzureServiceBusClient("serviceBusConnection");" will resolve this issue, so need update the document.

Issue 2; For Add the .NET Aspire component to the API section, when copy below code to machine ,

It will meet below issue as below screenshot, so need update the document.

Issue 3 For Create the API endpoint section, document lets copy below codes,

After add below code, it will show an error, when add ";" in line 38, this error will disappear, so the document. need update.

[IEvangelist]

Closing as duplicate of #489 - and being addressed as part of #1043