ci.yml in simple_calendar-3.0.0

- old
+ new

@@ -10,27 +10,28 @@
 jobs:
   tests:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.6', '2.7', '3.0']
+        ruby: ['2.7', '3.0', '3.1', '3.2']
         gemfile:
-          - rails_6
           - rails_6_1
-          - rails_master
+          - rails_7_0
+          - rails_main
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
       BUNDLE_PATH_RELATIVE_TO_CWD: true
 
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler: default
           bundler-cache: true
+          rubygems: latest
 
       - name: StandardRb check
         run: bundle exec standardrb
 
       - name: Run tests