Fix CI workflows

.github/workflows/main.yml

@@ -1,27 +1,28 @@
-name: Ruby
-
+---
+name: CI
 on:
   push:
     branches:
-      - master
-
+      - main
   pull_request:
-
+    branches:
+      - main
 jobs:
-  build:
+  test:
     runs-on: ubuntu-latest
-    name: Ruby ${{ matrix.ruby }}
     strategy:
+      fail-fast: false
       matrix:
-        ruby:
-          - '2.7.8'
-
+        ruby: ['3.1', '3.2']
+        gemfile: ['Gemfile']
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true
-    - name: Run the default task
-      run: bundle exec rake
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler: '2.4.12'
+          bundler-cache: true
+      - run: bundle exec rubocop
+      - run: bundle exec rspec