fix(rules): keep last downloaded detection rules when an update fails - #182

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/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4, cardinalby/export-env-action@66657b34899a2d695434ed060d9f2215db9b4035, cardinalby/webext-buildtools-pack-extension-dir-action@28fdcac9860fb08555580587cab0d33afe4a341d. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/