Bump Enki to 0.2.3

Brings a fix for USB/LIVECD differences with grub:

kairos-io/enki@8efbc04

Signed-off-by: Itxaka <itxaka@kairos.io>

Author: Itxaka

tools-image/Dockerfile

@@ -1,7 +1,7 @@
 # https://quay.io/repository/kairos/packages?tab=tags&tag=latest
 ARG LEAP_VERSION=15.5
 ARG LUET_VERSION=0.35.5
-ARG ENKI_VERSION=0.2.2
+ARG ENKI_VERSION=0.2.3
 
 FROM quay.io/luet/base:$LUET_VERSION AS luet
 FROM quay.io/kairos/enki:v${ENKI_VERSION} as enki