The following artifacts were uploaded using a version of actions/upload-artifact that is scheduled for deprecation: "hklpy-docs". Please update your workflow to use v4 of the artifact actions. Learn more: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/upload-artifact@v3, peaceiris/actions-gh-pages@bbdfb200618d235585ad98e965f4aafc39b4c501. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.