[ci] Update actions/checkout action to v4

Author: lpinca

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
           - 18
           - 20
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}