🚨 [security] Update ws 8.20.1 → 8.21.3 (minor) - #486

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-node@v1, codecov/codecov-action@v2.1.0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/