Put back accidental remove

Author: RolfHuisman

.github/workflows/publish.yml

@@ -24,6 +24,7 @@ jobs:
       uses: actions/setup-dotnet@v3
       with:
           dotnet-version: '8.0.x'
+          source-url: https://nuget.pkg.github.com/qsharp-community/index.json
       env:
         NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}