fix(deps): hono 4.12.21 → 4.12.31 잠금파일 갱신으로 감사 실패 해소 - #187

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