ci: drop unneeded checks: write permission from coverage job

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Author: reeshika-h

.github/workflows/unit-testing.yml

@@ -11,7 +11,6 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      checks: write
       pull-requests: write
 
     steps: