Fix deprecation warning in GitHub Actions

Author: benedikt

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
       - id: mongodb
         name: Start MongoDB
         uses: mongodb-labs/drivers-evergreen-tools@master
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}