Add dotnet nuget list source (actions#3373)

images/win/post-generation/Dotnet.ps1

@@ -7,5 +7,8 @@ if (-not $latestPath.Contains($dotnetPath))
     [System.Environment]::SetEnvironmentVariable('PATH', $latestPath, [System.EnvironmentVariableTarget]::Machine)
 }
 
-# Delete empty nuget.config file to prevent the issue with downloading packages from nuget.org https://github.com/actions/virtual-environments/issues/3038
+# Delete empty nuget.config file created by choco and recreate the config using the 'dotnet nuget list source command'
+# before choco or powershell’s ancient embedded nuget does to prevent the issue with downloading packages from nuget.org
+# https://github.com/actions/virtual-environments/issues/3038
 Remove-Item $env:APPDATA\NuGet\NuGet.Config -Force
+dotnet nuget list source