[!][TASK] Adjust GH workflow to fix SHA commits: TYPO3-Documentation/render-guides#1194

Author: garvinhicking

.github/workflows/documentation.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Test if the documentation will render without warnings
         run: |