DOC Update CMS 6.3 changelogs - #901

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871, actions/setup-node@0a44ba7841725637a19e28fa30b79a866c81b0a6, shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/