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

Author: renovate[bot]

.github/workflows/backport.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.event.pull_request.merged
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           fetch-depth: 0
 

.github/workflows/commands.yml

@@ -27,7 +27,7 @@ jobs:
         permission-level: write
 
     - name: Checkout
-      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       with:
         fetch-depth: 0