Update deploying.rst

Version 0.4 of sphinx-action contains a problem investigated and documented here: ammaraskar/sphinx-action#5. The action throws an error claiming it can't write the log file. The problem is fixed in master and since this is a tutorial, it is more or less expected that it should work off the bat, so I thinking pinning the master version for now and the next release when it comes out, might be the best way to help newbies.

doc/tutorial/deploying.rst

@@ -192,7 +192,7 @@ contents:
        steps:
        - uses: actions/checkout@v3
        - name: Build HTML
-         uses: ammaraskar/sphinx-action@0.4
+         uses: ammaraskar/sphinx-action@master
        - name: Upload artifacts
          uses: actions/upload-artifact@v3
          with: