Use gated push for rel/* instead of main push logic

Author: Arlodotexe

.github/workflows/build.yml

@@ -302,7 +302,7 @@ jobs:
           dotnet nuget push "*.nupkg" --api-key dummy --source PullRequests --skip-duplicate
           
       - name: Push packages (main)
-        if: ${{ (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/rel/')) && env.HAS_BUILDABLE_COMPONENTS == 'true' }}
+        if: ${{ github.ref == 'refs/heads/main' && env.HAS_BUILDABLE_COMPONENTS == 'true' }}
         run: |
           dotnet nuget add source https://pkgs.dev.azure.com/dotnet/CommunityToolkit/_packaging/CommunityToolkit-Labs/nuget/v3/index.json `
             --name LabsFeed `