fix(linux-egui): 听写可用性两修 —— Menu 热键 / 录音掉线不丢字（+ 诊断日志） - #1255

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

The process '/usr/bin/git' failed with exit code 128