Potential fix for code scanning alert no. 87: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Mustapha BARKI <code4yo@gmail.com>

Author: akabarki76

.github/workflows/turbopack-nextjs-build-integration-tests.yml

@@ -5,6 +5,9 @@ on:
     - cron: '0 6 * * *'
   workflow_dispatch: {}
 
+permissions:
+  contents: read
+
 jobs:
   test-dev:
     name: Next.js integration tests