DNS entries for GitHub pages

I find the GitHub Pages custom domain instructions hard to follow. The usual answer for me is:

1. Add a DNS CNAME record for d6y.github.io (replace d6y with your GitHub username or organisation name).
2. Add an A record pointing to 185.199.108.153 (alternative IP addresses are available but I don’t know why you’d pick one over another).

Like this:

The buttons inside the GitHub > Settings > Pages are simple enough for me to follow. With that done and the DNS updated, the site is served from your custom domain name.