fix(weixin): Windows 微信连接自动选用桌面版维护的标准 CLI，零配置跑通全链路 (issue #2028/#1879) - #2276

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, actions/setup-node@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/