Apply suggestions from PR review

Author: Court72

articles/event-hubs/event-hubs-faq.yml

@@ -152,9 +152,9 @@ sections:
           There's **no cost** associated with this feature. 
           
       - question: |
-          Can Zone Redundancy be enabled for existing Event Hub Namespace?
+          Can Zone Redundancy be enabled for an existing Event Hub Namespace?
         answer: |
-          Currently this is not possible as old Event Hub Namespaces are in different clusters and there is no way to migrate those to the newly clusters which automatically provides zone redundancy enabled when newly Event Hub namespaces are created.
+          Currently, this isn't possible because old Event Hub Namespaces are in different clusters, and there's no way to migrate them to the new clusters that automatically enable zone redundancy when new Event Hub namespaces are created.
 
       - question: |
           How are throughput limits enforced?