Add top-level OIDC permissions to publish workflow

Co-authored-by: Ona <no-reply@ona.com>

.github/workflows/publish.yml

@@ -4,6 +4,10 @@ on:
   release:
     types: [published]
 
+permissions:
+  id-token: write  # Required for OIDC
+  contents: read
+
 jobs:
   publish:
     runs-on: ubuntu-latest