GH Pages warning - outdated IP address

[wohali]

The page build completed successfully, but returned the following warning for the gh-pages branch:

The custom domain for your GitHub Pages site is pointed at an outdated IP address. You must update your site's DNS records if you'd like it to be available via your custom domain. For more information, see https://docs.github.com/github/working-with-github-pages/configuring-a-custom-domain-for-your-github-pages-site.

@gr2m @janl who can help fix this?