(maint) Update actions/checkout action to v4.2.1

Author: renovate[bot]

.github/workflows/build.yaml

@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
       - name: Fetch all tags and branches
         run: git fetch --prune --unshallow
       - name: Cache Tools