Update actions/checkout action to v4.2.1 (#31)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/update.yml

@@ -11,7 +11,7 @@ jobs:
       pull-requests: write # For actions/github-script
 
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
 
       - name: Get npm cache directory path
         id: npm-cache-dir-path