[artix-general] Adding a new artix mirror

[Dominika Liberda]

Hi,

I've made an artix mirror on my infra. The details are as follows:

URL: https://artix.sakamoto.pl/ (HTTP or HTTPS; can do rsync if useful)
Bandwidth: 500Mbps
Location: Warsaw, Poland

I'm already hosting official Alpine Linux (alpine.sakamoto.pl) and Void
Linux (void.sakamoto.pl) mirrors on my infra. I'm keen on keeping high
uptime in the future ^^

~sdomi