[CI] Fix documentation job (#7048)

second try based on o3 suggestions

Author: ThomasRaoux

.github/workflows/documentation.yml

@@ -4,7 +4,8 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
-permissions: read-all
+permissions:
+  contents: write
 
 jobs:
   Build-Documentation:
@@ -15,7 +16,7 @@ jobs:
       - name: Checkout branch
         uses: actions/checkout@v4
         with:
-          token: ${{ github.token }}
+          token: ${{ secrets.GITHUB_TOKEN }}
           fetch-depth: 0
 
       - name: Clear docs