릴리스 파이프라인 수정 - 실행 권한, CHANGELOG 구조, 2.0.0 버전 기준점 - #22

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/