Bump serde from 1.0.228 to 1.0.229 - #399

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