K8s: add BD level HA note (#2079)

* add BD level HA note

* Update content/operate/rs/databases/configure/replica-ha.md

Co-authored-by: David Dougherty <[email protected]>

---------

Co-authored-by: David Dougherty <[email protected]>

Author: kaitlynmichael

content/operate/rs/databases/configure/replica-ha.md

@@ -110,6 +110,8 @@ By default, replica HA has a 10-minute grace period after node failure and befor
 
 {{<note>}}The default grace period is 30 minutes for containerized applications using [Redis Enterprise Software for Kubernetes]({{< relref "/operate/kubernetes/" >}}).{{</note>}}
 
+{{<note>}}For Kubernetes deployments, if ReplicaHA (previously SlaveHA) is enabled at the cluster level, you must also manually enable it at the database level for each RedisEnterpriseDatabase (REDB) using the UI or `rladmin`. Without manual database-level configuration, databases will show `slave_ha: disabled (database)` even when cluster-level ReplicaHA is enabled.{{</note>}}
+
 To configure this grace period from rladmin, run:
 
 ``` text