Add permissions for cleanup-preview-docs job (#122)

Author: AdnaneKhan

.github/workflows/Docs-Cleanup.yml

@@ -7,6 +7,8 @@ on:
 jobs:
   cleanup-preview-docs:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v4
         with:
@@ -23,4 +25,4 @@ jobs:
             git commit -m "delete preview"
             git branch gh-pages-new $(echo "delete history" | git commit-tree HEAD^{tree})
             git push --force origin gh-pages-new:gh-pages
-          fi
+          fi