ci: update React Native workflow to use Ruby 3.3

- Add ruby/setup-ruby@v1 action to build-ios job
- Use Ruby 3.3 to match local development environment
- Enable bundler-cache for faster CI builds
- Fixes: CFPropertyList-3.0.9 Ruby version incompatibility

Resolves CI error: "CFPropertyList-3.0.9 requires ruby version < 3.2,
which is incompatible with the current version, ruby 3.3.10p183"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Teodor Ciuraru

.github/workflows/react-native-ci.yml

@@ -138,6 +138,13 @@ jobs:
         with:
           xcode-version: "16.4"
 
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+          working-directory: react-native
+
       - name: Install Ruby gems
         working-directory: react-native
         run: bundle install