fix(dev): let a restarted fork reload changed .env values - #1592

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: denoland/setup-deno@e95548e56dfa95d4e1a28d6f422fafe75c4c26fb. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/