Fix md5sum check for arch to reflect new filename

roles/netbootxyz/templates/menu/archlinux.ipxe.j2

@@ -37,7 +37,7 @@ kernel http://${archlinux_mirror}/${dir}/x86_64/vmlinuz-linux ${params} initrd=i
 initrd http://${archlinux_mirror}/${dir}/x86_64/initramfs-linux.img
 echo
 echo MD5sums:
-md5sum vmlinuz initramfs-linux.img
+md5sum vmlinuz-linux initramfs-linux.img
 boot
 goto archlinux_exit