Update NuGet.config with new templating source

Author: marcpopMSFT

NuGet.config

@@ -25,8 +25,7 @@
     <add key="darc-int-dotnet-runtime-574100b" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-574100b6/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--  Begin: Package sources from dotnet-templating -->
-    <add key="darc-pub-dotnet-templating-d108a65" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-d108a65d/nuget/v3/index.json" />
-    <add key="darc-pub-dotnet-templating-d108a65-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-d108a65d-1/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-templating-a2c4545" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-a2c45457/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-templating -->
     <!--  Begin: Package sources from dotnet-windowsdesktop -->
     <add key="darc-int-dotnet-windowsdesktop-2540f0e" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-windowsdesktop-2540f0e7/nuget/v3/index.json" />