Fix path for NuGet artifacts (#55)

Author: axunonb

.github/workflows/build.yml

@@ -138,5 +138,5 @@ jobs:
 
     - name: Publish to NuGet
       if: github.ref == 'refs/heads/main' && github.event_name == 'push'
-      working-directory: .
+      working-directory: ${{ github.workspace }}
       run: dotnet nuget push "artifacts/*.nupkg" --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate