Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
       id-token: none
 
     steps:
-      - uses: actions/checkout@v3.0.0
+      - uses: actions/checkout@v4.1.2
 
       - name: Login to GitHub
         if: github.event_name != 'pull_request'