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

Author: renovate[bot]

.github/workflows/deno-ci-check.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Setup repo
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Setup Deno
         uses: denoland/setup-deno@e95548e56dfa95d4e1a28d6f422fafe75c4c26fb # v2.0.3