try actions/checkout@v4

Author: rickhull

.github/workflows/tests.yaml

@@ -27,7 +27,7 @@ jobs:
         # ruby: [ head ]
     name: Ruby ${{ matrix.ruby }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: