rubocop.yml in elastic-enterprise-search-8.5.0

- old
+ new

@@ -9,7 +9,7 @@
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.7
     - name: Run Rubocop
       run: |
-        bundle install
-        bundle exec rubocop
+        gem install rubocop
+        rubocop