update core index.json - #1582

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633, actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8, step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0U8CNagAAAAC1rB3F/IhOSac5caZlwuvgQ0gxQUEyMDMwODEzMDU0AEVkZ2U=