Bump actions/checkout action to v5

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
     container: dockfool/cake-docker:latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v5.0.0
         with:
           fetch-depth: 0
           filter: tree:0