elemental-quickstart: remove GM2 reference

This is no longer applicable for 6.1

Author: hardys

asciidoc/quickstart/elemental.adoc

@@ -32,7 +32,7 @@ The following describes the minimum system and environmental requirements to run
  ** Running SLES 15 SP6, openSUSE Leap 15.6, or another compatible operating system that supports Podman.
  ** With https://kubernetes.io/docs/reference/kubectl/kubectl/[Kubectl], https://podman.io[Podman], and https://helm.sh[Helm] installed
 * A USB flash drive to boot from (if using physical hardware)
-* A downloaded copy of the latest SUSE Linux Micro {version-operatingsystem} SelfInstall "GM2" ISO image found https://www.suse.com/download/sle-micro/[here].
+* A downloaded copy of the latest SUSE Linux Micro {version-operatingsystem} SelfInstall ISO image found https://www.suse.com/download/sle-micro/[here].
 
 NOTE: Existing data found on target machines will be overwritten as part of the process, please make sure you backup any data on any USB storage devices and disks attached to target deployment nodes.