Support --mlc_isolate - #309

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: mlcommons/cla-bot@7facd19917cdb24be27bd8d266b41094506a0fb2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/