ci: fix null vs empty string check for review body

Author: tychtjan

.github/workflows/sdk_pr_review.yml

@@ -39,7 +39,7 @@ jobs:
     name: "Apply Review Fixes"
     if: >-
       (github.event.review.state == 'changes_requested'
-        || (github.event.review.state == 'commented' && github.event.review.body != ''))
+        || (github.event.review.state == 'commented' && github.event.review.body))
       && (github.event.pull_request.user.login == 'yenkins-admin'
           || github.event.pull_request.user.login == 'tychtjan')
       && github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name