OSDOCS-2925 - added step to initiate cluster transfer in OCM to pull secret doc, peer review edits, made admonition

Author: dayleparker

modules/images-update-global-pull-secret.adoc

@@ -11,6 +11,13 @@
 
 You can update the global pull secret for your cluster by either replacing the current pull secret or appending a new pull secret.
 
+[IMPORTANT]
+====
+To transfer your cluster to another owner, you must first initiate the transfer in link:https://console.redhat.com/openshift/[Red Hat OpenShift Cluster Manager], and then update the pull secret on the cluster. Updating a cluster's pull secret without initiating the transfer in OpenShift Cluster Manager causes the cluster to stop reporting Telemetry metrics in OpenShift Cluster Manager. 
+
+For more information link:https://access.redhat.com/documentation/en-us/openshift_cluster_manager/2021/html/managing_clusters/assembly-managing-clusters#transferring-cluster-ownership_assembly-managing-clusters[about transferring cluster ownership], see "Transferring cluster ownership" in the Red Hat OpenShift Cluster Manager documentation. 
+====
+
 [WARNING]
 ====
 Cluster resources must adjust to the new pull secret, which can temporarily limit the usability of the cluster.