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

Author: renovate[bot]

.github/workflows/build.yml

@@ -27,7 +27,7 @@ jobs:
             php: '7.4'
             os: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
@@ -66,7 +66,7 @@ jobs:
     needs: test
     if: github.repository_owner == 'xdebug' && github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with: