Broken link for coreutils-hybrid on instalation.md

[lbellomo]

On instalation.md -> coreutils-hybrid (AUR) or on the docs the link to the arch linux package coreutils-hybrid is broken (404).

Also, I can't find any info on that package, and it doesn't seem to exist anymore.

Is it ok to delete that part of the doc?

[cakebaker]

Sorry, I overlooked this issue and already fixed it in #7554