rubocop.yml in cpflow-3.0.1

- old
+ new

@@ -14,10 +14,10 @@
       - name: Checkout code
         uses: actions/checkout@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "2.7"
+          ruby-version: "3.2"
           bundler-cache: true
       - name: Install dependencies
         run: bundle install
       - name: Analyze code
         run: bundle exec rubocop