chore(ci): reduce workflow's permissions

This workflow performs all actions via a GitHub app, so the default `GITHUB_TOKEN` doesn't need write perms.

Author: Piccirello

.github/workflows/release.yml

@@ -13,9 +13,6 @@ on:
       - "turbo.json"
       - ".github/workflows/release.yml"
 
-permissions:
-  contents: write
-
 concurrency:
   group: release
   cancel-in-progress: true