rubocop.yml in rspec-openapi-0.8.0

- old
+ new

@@ -18,12 +18,10 @@
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.6
-
-    - name: Install dependencies
-      run: bundle install
+        bundler-cache: true
 
     - name: Rubocop run
       run: |
         bash -c "
           bundle exec rubocop --require code_scanning --format CodeScanning::SarifFormatter -o rubocop.sarif