chore: [StepSecurity] Apply security best practices (#2263)

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>
Co-authored-by: stepsecurity-app[bot] <188008098+stepsecurity-app[bot]@users.noreply.github.com>

Author: stepsecurity-app[bot]

.github/workflows/test-review-sync.yml

@@ -10,6 +10,9 @@ on:
       - '.github/scripts/review-sync/**'
       - '.github/workflows/test-review-sync.yml'
 
+permissions:
+  contents: read
+
 jobs:
   test:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork == false