Update network-security-perimeter.md

Author: samurp

articles/event-hubs/network-security-perimeter.md

@@ -24,7 +24,7 @@ Operating as a service under Azure Private Link, the Network Security Perimeter
 > [!NOTE]
 > Network Security Perimeter does not support [Azure Event Hubs - Geo-disaster recovery](event-hubs-geo-dr.md)
 
-## Associate Event Hubs with a Network Security Perimeter in the Azure portal.
+## Associate Event Hubs with a Network Security Perimeter in the Azure portal
 1. Search for "Network Security Perimeter" in the Portal search bar and then click on **Create** button and create the resource.
 1. In the first screen, provide a Name and Region and choose the subscription.
 1. Under the **Resources** section, click on the **Associate** button and navigate to the Event Hubs namespace you want to add.