chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/release.yaml

@@ -19,7 +19,7 @@ jobs:
       tag_name: ${{ steps.release-please.outputs.tag_name }}
     steps:
       - name: Checkout
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Release Please
         id: release-please
         uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4.4.0