fix(cache): Add write permissions to clear cache workflow

Author: AdrienPoupa

content/actions/writing-workflows/choosing-what-your-workflow-does/caching-dependencies-to-speed-up-workflows.md

@@ -339,6 +339,8 @@ on:
 jobs:
   cleanup:
     runs-on: ubuntu-latest
+    permissions:
+      actions: write
     steps:
       - name: Cleanup
         run: |