Update faq.md

update description

Author: frantran

articles/kubernetes-fleet/faq.md

@@ -46,6 +46,7 @@ The current preview of Azure Kubernetes Fleet Manager resource supports joining
 Azure Kubernetes Fleet Manager resource is a regional resource. Support for region failover for disaster recovery use cases is in the [roadmap](https://aka.ms/fleet/roadmap).
 
 ## What happens when the user changes the cluster identity of a joined cluster?
+Changing the identity of a joined cluster will break the communication between fleet hub and member clusters. \
 The member agent will automatically pick up the new identity and communicate with the hub using the new token.  \
 However, the fleet hub is unaware of the new identity, and needs to be reconfigured to authorize the member. \
 You can join the member cluster to the fleet again by performing an update operation to notify the fleet hub to pick up the new identity. \