Do not encourage using yaourt

[boreq]

The readme mentions the following:

# latest released version
yaourt -S gimme

# current git HEAD revision
yaourt -S gimme-git

Yaourt is no longer maintained and is considered dangerous. I recommend replacing all mentions of yaourt with a different program to avoid confusing the users. I can personally recommend widely used yay.

For more information see this old version of the comparison table on Arch wiki. All mentions of yaourt were removed from it since then. https://wiki.archlinux.org/index.php?title=AUR_helpers&oldid=572181#Pacman_wrappers

[BanzaiMan]

We welcome your PR! :-)