chore(deps): update actions/checkout digest to df4cb1c

Author: renovate[bot]

.github/workflows/diff-generated-code.yml

@@ -11,13 +11,13 @@ jobs:
 
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           path: pr-branch
 
       - name: Checkout target branch
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           ref: ${{ github.event.pull_request.base.sha }}
           path: base-branch