test ruby 3.4 on github actions

Author: flyerhzm

.github/workflows/main.yml

@@ -11,7 +11,7 @@
      runs-on: ubuntu-latest
      strategy:
        matrix:
-         ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3']
+         ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
 
      steps:
      - uses: actions/checkout@v3
@@ -31,7 +31,7 @@
        - uses: actions/checkout@v3
        - uses: ruby/setup-ruby@v1
          with:
-           ruby-version: '3.2'
+           ruby-version: '3.4'
            bundler-cache: true
        - name: Install required gem dependencies
          run: gem install yard --no-document