Merge pull request #26 from lugi0/feature/auto-approve-lgtm

don't fail with empty comment body

Author: lugi0

.github/workflows/scripts/pr_workflow.py

@@ -109,7 +109,8 @@ def verify_labeler_config(self) -> None:
             if (
                 self.event_name == "issue_comment" or self.event_name == "pull_request_review"
             ) and not self.comment_body:
-                sys.exit("`COMMENT_BODY` is not set")
+                LOGGER.info("No comment, nothing to do. Exiting.")
+                sys.exit(0)
 
     def run_pr_label_action(self) -> None:
         if self.action == self.SupportedActions.pr_size_action_name: