Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Set up system
       run: bin/before_install
     - name: Set up Node