Merge pull request #46 from ruby/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 3 to 4

Author: hsbt

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       TEST_SYMLINK: ${{ matrix.TEST_SYMLINK }}
     continue-on-error: ${{ matrix.ruby-version == 'head' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: