ユーザー登録/編集時のニックネーム欄に半角・全角スペースが登録できてしまう件の修正 - #4454

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@v7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/