Try not push unexciting symbol packages (bug nuget)

Author: pmiossec

.github/workflows/dotnetcore.yml

@@ -22,4 +22,4 @@ jobs:
     - name: Push to Nuget.org nuget feed
       run: |
         cd "src/GitExtensions.AzureDevOpsCommitMessage/bin/Release"
-        dotnet nuget push *.nupkg -k ${{ secrets.NUGET_PUSH_TOKEN }} -s https://api.nuget.org/v3/index.json
+        dotnet nuget push *.nupkg -n -k ${{ secrets.NUGET_PUSH_TOKEN }} -s https://api.nuget.org/v3/index.json