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

Author: renovate[bot]

.github/workflows/prek.yml

@@ -6,5 +6,5 @@ jobs:
   prek:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v5.0.0
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
     - uses: j178/prek-action@v1.0.11