Fix build failure due to incorrect XML comment tags in nuget.config

Author: Jason Zhai

NuGet.config

@@ -31,6 +31,7 @@
     <!--  Begin: Package sources from dotnet-templating -->
     <add key="darc-pub-dotnet-templating-a977119" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-a977119e/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-a977119-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-a977119e-1/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-templating-0da2c6e" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-0da2c6ec/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-templating -->
     <!--  Begin: Package sources from dotnet-windowsdesktop -->
     <add key="darc-int-dotnet-windowsdesktop-8506c0d" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-windowsdesktop-8506c0d8/nuget/v3/index.json" />