OCPBUGS#60416 [enterprise-4.12] There is one more wrong example in FROM clause of image layering docs

Fixed one more mistaken example of how the base image for RHCOS layering
is expected to look like.

Manual enterprise-4.12 backport.

Author: palonsoro

modules/coreos-layering-configuring.adoc

@@ -30,7 +30,7 @@ For example, the following Containerfile creates a custom layered image from an
 [source,yaml]
 ----
 # Using a 4.12.0 image
-FROM quay.io/openshift-release/ocp-release@sha256... <1>
+FROM quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256... <1>
 #Install hotfix rpm
 RUN rpm-ostree cliwrap install-to-root / && \ <2>
     rpm-ostree override replace http://mirror.centos.org/centos/8-stream/BaseOS/x86_64/os/Packages/kernel-{,core-,modules-,modules-extra-}4.18.0-483.el8.x86_64.rpm && \ <3>