Merge pull request #56986 from xenolinux/replace-etcd

OCPBUGS#8674: Replacing an unhealthy etcd member

Author: jab-rh

modules/restore-replace-stopped-etcd-member.adoc

@@ -17,6 +17,12 @@ If your cluster uses a control plane machine set, see "Troubleshooting the contr
 
 * You have identified the unhealthy etcd member.
 * You have verified that either the machine is not running or the node is not ready.
++
+[IMPORTANT]
+====
+You must wait if the other control plane nodes are powered off. The control plane nodes must remain powered off until the replacement of an unhealthy etcd member is complete.
+====
++
 * You have access to the cluster as a user with the `cluster-admin` role.
 * You have taken an etcd backup.
 +