Align workflow with main branch

- Use bundle lock --add-platform for linux compatibility
- Remove explicit bundler version from exec commands
- Use vendor/bundle path consistently

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

.github/workflows/ruby.yml

@@ -47,12 +47,10 @@ jobs:
           path: vendor/bundle
           key: root-gem-cache-${{ matrix.ruby }}-${{ hashFiles('Gemfile.lock') }}
       - name: Install Ruby Gems
-        run: bundle check --path=${{ github.workspace }}/vendor/bundle || bundle _2.4.9_ install --path=${{ github.workspace }}/vendor/bundle --jobs=4 --retry=3
-      - name: Restore Gemfile.lock if modified by bundle install
-        run: git checkout Gemfile.lock
+        run: bundle lock --add-platform 'x86_64-linux' && bundle check --path=vendor/bundle || bundle _2.4.9_ install --path=vendor/bundle --jobs=4 --retry=3
       - run: yarn
-      - run: bundle _2.4.9_ exec rake react:update
-      - run: bundle _2.4.9_ exec rake ujs:update
+      - run: bundle exec rake react:update
+      - run: bundle exec rake ujs:update
       - run: ./check_for_uncommitted_files.sh
 
   test: