Update actions/checkout digest to de0fac2

Author: renovate[bot]

.github/workflows/publish_doc.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           fetch-depth: 0
           ssh-key: ${{ secrets.KEY }}