[tests] fix duplicate sources in NuGet.config - #8772

[tests] fix duplicate sources in NuGet.config#8772

jonathanpeppers merged 2 commits into

dotnet:maindotnet/android:mainfrom

jonathanpeppers:DuplicateNuGetSourcesjonathanpeppers/xamarin-android:DuplicateNuGetSourcesCopy head branch name to clipboard