message: [GHA][LBT] Fix regex in parsing commit message
  The original regex used \w and missed the "-".
  Closes:
  Approved by: runtian-zhou
diff: @@ -50,7 +50,7 @@ jobs:
  // Find the number of the pull request that trigggers this push
  let pr_num = 0;
  let commit_message = context.payload.head_commit.message;
  - let re = /.*[^]Closes:\s\#(\d+)[^]Approved\sby:\s\w+$/;
  + let re = /.*[^]Closes:\s\#(\d+)[^]Approved\sby:\s[A-Za-z0-9_-]+$/;
  if (re.test(commit_message)) {
  let match = re.exec(commit_message);
  pr_num = match[1];
  