fix misleading wording (#4379)

Signed-off-by: yaron2 <[email protected]>

daprdocs/content/en/concepts/overview.md

@@ -108,7 +108,7 @@ Deploying and running a Dapr-enabled application into your Kubernetes cluster is
 
 ### Clusters of physical or virtual machines
 
-The Dapr control plane services can be deployed in high availability (HA) mode to clusters of physical or virtual machines in production. In the diagram below, the Actor `Placement` and security `Sentry` services are started on three different VMs to provide HA control plane. In order to provide name resolution using DNS for the applications running in the cluster, Dapr uses [Hashicorp Consul service]({{< ref setup-nr-consul >}}), also running in HA mode.  
+The Dapr control plane services can be deployed in high availability (HA) mode to clusters of physical or virtual machines in production. In the diagram below, the Actor `Placement` and security `Sentry` services are started on three different VMs to provide HA control plane. In order to provide name resolution using DNS for the applications running in the cluster, Dapr uses multicast DNS by default, but can also optionally support [Hashicorp Consul service]({{< ref setup-nr-consul >}}).  
 
 <img src="/images/overview-vms-hosting.png" width=1200 alt="Architecture diagram of Dapr control plane and Consul deployed to VMs in high availability mode">