[arch-mirrors] please update the URL for the Hungarian mirror provided by the Centre for Energy Research

Hello, Could you please update our (Centre for Energy Research) mirror URL ...

Hungary

* energia.mta.hu <http://ftp.energia.mta.hu/pub/mirrors/ftp.archlinux.org/iso/2021.07.01/>

to http://ftp.ek-cer.hu/pub/mirrors/ftp.archlinux.org/... Thanks, Gergely