No option for Adding .NET Aspire Support

### Type of issue

Missing information

### Description

I am trying to add .NET Aspire support to an existing Blazor server application that was initially started with .NET7 and later upgraded to .NET9. When I go into Add option by right clicking the project in Visual Studio 2022, I don't see the Add .NET Aspire Support option there. Instead I see Add Telemetry option.

We need improvement in the docs to guide what to do when the option to .NET Aspire is not seen.

### Page URL

https://learn.microsoft.com/en-us/dotnet/aspire/get-started/add-aspire-existing-app?tabs=windows

### Content source URL

https://github.com/dotnet/docs-aspire/blob/main/docs/get-started/add-aspire-existing-app.md

### Document Version Independent Id

8fd88d3c-cf2c-973d-e88b-83e552cd8fa0

### Platform Id

e910e88b-fdb8-ee4b-83d3-e833e605bd03

### Article author

@IEvangelist

[Related Issues](https://github.com/dotnet/docs-aspire/issues?q=is%3Aissue+is%3Aopen+8fd88d3c-cf2c-973d-e88b-83e552cd8fa0)