rubocop.yml in rspec-openapi-0.15.0

- old
+ new

@@ -17,10 +17,10 @@
       uses: actions/checkout@v4
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6
+        ruby-version: 3.3
         bundler-cache: true
 
     - name: Rubocop run
       run: |
         bash -c "