[CDPx] update nuget feed (#1364)

.pipelines/nuget.config

@@ -5,6 +5,6 @@
   </config>
   <packageSources>
     <clear />
-    <add key="0" value="https://msazure.pkgs.visualstudio.com/_packaging/PipelineBuildSupplement/nuget/v3/index.json" />
+    <add key="0" value="https://microsoft.pkgs.visualstudio.com/_packaging/0/nuget/v3/index.json" />
   </packageSources>
 </configuration>