chore: promote testing to main (#1040)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.github/workflows/pr-validation.yml

@@ -6,6 +6,9 @@ on:
       - testing
   merge_group:
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && format('pr-{0}', github.event.pull_request.number) || github.run_id }}
   cancel-in-progress: ${{ github.event_name == 'pull_request' }}