Test using local action

[kenorb]

Convert Action@master and Action@dev into one file using local action, e.g.

    - name: Run Custom Docker Action
      uses: ./maven # local action
      with:
        args: clean

See: https://github.community/t5/GitHub-Actions/Custom-docker-action-mounted-volumes/td-p/39350

[kenorb]

Fixed in a58f46d.