Update mqtt-request-response-messages.md

Author: Venkata Yaddanapudi

articles/event-grid/mqtt-request-response-messages.md

@@ -14,7 +14,7 @@ ms.author: veyaddan
 In this guide, you learn how to use MQTT v5 Request-Response messaging pattern to implement command-response flow with MQTT broker.  Consider a sample scenario, in which a cloud application sends commands to devices and receives responses from the devices.
 
 ## Prerequisites
-- You have an Event Grid namespace created with MQTT enabled.  Refer to this [Quickstart - Publish and subscribe on an MQTT topic](mqtt-publish-and-subscribe-portal.md) to create the namespace, subresources, and to publish/subscribe on an MQTT topic.
+- You have an Event Grid namespace created with MQTT broker enabled.  Refer to this [Quickstart - Publish and subscribe on an MQTT topic](mqtt-publish-and-subscribe-portal.md) to create the namespace, subresources, and to publish/subscribe on an MQTT topic.
 
 ## Configuration needed in Event Grid namespace to implement Request-Response messaging pattern