Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608, actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8, zulip/github-actions-zulip/send-message@e4c8f27c732ba9bd98ac6be0583096dea82feea5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/