Merge pull request #142 from github/dependabot/github_actions/actions…

…/checkout-4

Bump actions/checkout from 3 to 4

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
         ruby_version: ["2.7", "3.0", "3.1", "3.2"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Update .ruby-version with matrix value
         run: echo "${{ matrix.ruby_version }}" >| .ruby-version
       - name: Set up Ruby