I have a RPi but I run NetBSD on it, not PiHole. AFAIK PiHole is just a modified dnsmasq and I dislike dnsmasq. I always used djbdns, never dnsmasq. Today, I use a custom root.zone loaded in nsd and a loopback bound forward proxy that stores the IP addresses for all the websites I visit in RAM. nsd listening on a loopback address just substitutes for a firewall rule directing traffic to the proxy. I use the HOSTS file for FTP server addresses.

These github.com addresses I listed are static for years at a time. As such, there is nothing to "update".