Fix arch installer

[chris-aeviator]

kiibohd-configurator-git cannot be installed on arch due to missing dependencies.

-> Konnte nicht alle benötigten Pakete finden:
	nodejs-lts-erbium(Angefordert von:kiibohd-configurator-git)

Please update also the displayed command in the readme - pacman -Syu kiibohd-configurator-git is not the way you are supposed to install a new package in arch (https://wiki.archlinux.org/title/Pacman#Installing_specific_packages) - if you run this command as in readme and something along the full system upgrade you just triggered goes wrong you'll have a high chance to end up with an instable system when not fixing it.