fix: 서버의 "등록된 알람 없음"(URT_001)을 실패가 아닌 정상 상태로 - #375

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/