fix: 린트가 객체로 봉인하라는데 스키마는 문자열만 받고 있었다 (v0.2.13) - #47

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, actions/setup-python@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/