#657 [security][tools] Bash と検証コマンドの、home の秘密の場所の読み取りを OS の隔離で拒否する（第 2 段） - #670

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, 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/