Merge pull request #1850 from cert-manager/renovate/major-misc-github-actions

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

Author: cert-manager-prow[bot]

.github/workflows/check.yaml

@@ -8,7 +8,7 @@ jobs:
   pull-cert-manager-website-verify:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: 24