configs/releng/airootfs/etc/mkinitcpio.conf: replace the deprecated archiso_kms hook with kms
The archiso_kms
hook was moved from mkinitcpio-archiso to the mkinitcpio project.
See https://github.com/archlinux/mkinitcpio/commit/7bfe4861eacb3bf6cb70d9a17a0262542733a8ed and https://gitlab.archlinux.org/mkinitcpio/mkinitcpio-archiso/-/commit/dec17db5324285118e2faee296cc990ff1281bd8.