Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/actionlint.yml

@@ -12,5 +12,5 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: reviewdog/action-actionlint@v1