fix: add permissions for PR labels

Author: pahud

.github/workflows/codebuild-pr-build.yml

@@ -22,6 +22,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event.pull_request.number || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  pull-requests: write
+  issues: write
+
 jobs:
   build:
     # Runner exists only for aws-cdk repo