update dotnet nuget why docs with requested version information

[zivkan]

Docs Page URL

https://aka.ms/dotnet/nuget/why

Description of the Issue

The feature request changes the output, so at the very least, the doc's example needs to be updated:

• Report real transitive reference versions in dotnet nuget why, not final resolved versions #13752

Suggested Fix

No response

Additional Context

No response