ci.yml in muffin_man-2.4.5

- old
+ new

@@ -24,9 +24,10 @@
         uses: actions/checkout@v2
       - name: Set up Ruby ${{ matrix.ruby-version }}
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
       - name: Install dependencies
         run: bundle install
       - name: Run RSpec
         run: bundle exec rspec
       - name: Run Rubocop