Merge pull request tegonal#149 from tegonal/feature/cleanup-read-permissions

github workflows: request only read rights for contents

Author: robstoll

src/.github/workflows/cleanup.yml

@@ -14,6 +14,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest