Bump andrew/ruby-upgrade-action

Bumps [andrew/ruby-upgrade-action](https://github.com/andrew/ruby-upgrade-action) from bf21270753cfca55167a09487745bd4be352f5cf to 9339371b5b58e54a2090801c5f3ef54fcc6ee044.
- [Release notes](https://github.com/andrew/ruby-upgrade-action/releases)
- [Commits](andrew/ruby-upgrade-action@bf21270...9339371)

---
updated-dependencies:
- dependency-name: andrew/ruby-upgrade-action
  dependency-version: 9339371b5b58e54a2090801c5f3ef54fcc6ee044
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/upgrade-ruby.yml

@@ -22,6 +22,6 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           persist-credentials: false
-      - uses: andrew/ruby-upgrade-action@bf21270753cfca55167a09487745bd4be352f5cf
+      - uses: andrew/ruby-upgrade-action@9339371b5b58e54a2090801c5f3ef54fcc6ee044
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}