Update feature-gates.md

Author: haardikdharma10

content/en/docs/reference/command-line-tools-reference/feature-gates.md

@@ -481,7 +481,9 @@ Each feature gate is designed for enabling/disabling a specific feature:
    for more details.
 - `ControllerManagerLeaderMigration`: Enables Leader Migration for 
   [kube-controller-manager](/docs/tasks/administer-cluster/controller-manager-leader-migration/#initial-leader-migration-configuration) and 
-  [cloud-controller-manager](/docs/tasks/administer-cluster/controller-manager-leader-migration/#deploy-cloud-controller-manager)
+  [cloud-controller-manager](/docs/tasks/administer-cluster/controller-manager-leader-migration/#deploy-cloud-controller-manager) which allows a cluster operator to live migrate 
+  controllers from the kube-controller-manager into an external controller-manager 
+  (e.g. the cloud-controller-manager) in an HA cluster without downtime.
 - `CPUManager`: Enable container level CPU affinity support, see
   [CPU Management Policies](/docs/tasks/administer-cluster/cpu-management-policies/).
 - `CRIContainerLogRotation`: Enable container log rotation for CRI container runtime. The default max size of a log file is 10MB and the