Merge pull request #1514 from a7i/amir/gha-perms

fix: github action Release Charts to have write permissions

Author: k8s-ci-robot

.github/workflows/release.yaml

@@ -5,6 +5,9 @@ on:
     branches:
       - release-*
 
+permissions:
+  contents: write # allow actions to update gh-pages branch
+
 jobs:
   release:
     runs-on: ubuntu-latest