Merge pull request 27813 from UpdateNugetv3 into master

nuget.config

@@ -8,7 +8,7 @@
   </activePackageSource>
   <packageSources>
     <clear/>
-    <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
+    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="VSIDEProj (cpvsbuild)" value="\\cpvsbuild\drops\vsideproj\Packages" />
     <add key="VSPackages" value="\\airstore\dd\nuget" />
   </packageSources>