Bump undici from 6.28.1 to 6.29.1 - #464

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: samuelmeuli/action-electron-builder@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/