chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
     env:
       DATABASE_URL: postgresql://postgres:postgres@localhost:5432/deployment-example-vercel
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version: 16