Bump ruby/setup-ruby from 1.207.0 to 1.208.0 in the github-actions gr…

…oup (WordPress#68720)

Bumps the github-actions group with 1 update: [ruby/setup-ruby](https://github.com/ruby/setup-ruby).


Updates `ruby/setup-ruby` from 1.207.0 to 1.208.0
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@4a9ddd6...868b3f0)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: desrosj <[email protected]>

.github/workflows/rnmobile-ios-runner.yml

@@ -28,7 +28,7 @@ jobs:
               with:
                   show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
 
-            - uses: ruby/setup-ruby@4a9ddd6f338a97768b8006bf671dfbad383215f4 # v1.207.0
+            - uses: ruby/setup-ruby@868b3f088412f139260f27f5b148179b9dd6b008 # v1.208.0
               with:
                   # `.ruby-version` file location
                   working-directory: packages/react-native-editor/ios