README out-of-date, Copr has Centos 8 builds

Hi, thanks for the great software!

Seems your README is out of date, it should say Centos 7 and 8:

https://github.com/jesseduffield/lazygit/blob/master/README.md#fedora-and-centos-7

I see there is Centos 8 https://copr.fedorainfracloud.org/coprs/atim/lazygit/, and have installed it :)