Workflow never completes

The action deployed to Heroku successfully, but hangs on the 'Run akhileshns/heroku-deploy@v3.12.12' step, and never finishes:
![image](https://user-images.githubusercontent.com/64696205/166100615-e256a380-e2d0-4c14-b330-2bb26e7b8726.png)
