Fix action

Author: thomasreuvers

.github/workflows/publishNuGet.yml

@@ -49,4 +49,4 @@ jobs:
       - name: Publish to NuGet
         env:
           NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
-        run: dotnet nuget push ./nupkg/*.nupkg --api-key $
+        run: dotnet nuget push ./nupkg/*.nupkg --api-key $NUGET_API_KEY --source https://api.nuget.org/v3/index.json