Use actions/checkout@v3

Author: hsbt

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
           - { ruby: 'jruby-9.2.19.0', os: 'ubuntu-latest' }
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: