Update Aspire docs for new Azure.Provisioning version in 9.0

[eerhardt]

Describe the issue or suggestion

In .NET Aspire 9.0, we are updating the Azure.Provisioning packages to the latest, non-preview versions.

We need to update any docs that is using the old, experimental versions.

For example:

https://github.com/dotnet/docs-aspire/blob/296ef574f60e2cb2f609137857de361670a58234/docs/troubleshooting/name-is-already-in-use.md?plain=1#L30-L35