LuaSTG-Flux addon - #348

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: ./action/dist, actions/checkout@v3, dsaltares/fetch-gh-release-asset@1.1.0, stefanzweifel/git-auto-commit-action@v4.16.0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/