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

Author: renovate[bot]

.github/workflows/zizmor.yml

@@ -21,7 +21,7 @@ jobs:
     permissions:
       security-events: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           persist-credentials: false