Add new support region

Author: Wenhao Zhang

articles/spring-apps/how-to-enable-redundancy-and-disaster-recovery.md

@@ -35,6 +35,7 @@ Azure Spring Apps currently supports availability zones in the following regions
 - Brazil South
 - Canada Central
 - Central US
+- East Asia
 - East US
 - East US 2
 - France Central
@@ -55,7 +56,7 @@ The following limitations apply when you create an Azure Spring Apps Service ins
 - Zone redundancy is not available in basic tier.
 - You can enable zone redundancy only when you create a new Azure Spring Apps Service instance.
 - If you enable your own resource in Azure Spring Apps, such as your own persistent storage, make sure to enable zone redundancy for the resource. For more information, see [How to enable your own persistent storage in Azure Spring Apps](how-to-custom-persistent-storage.md).
-- Zone redundancy ensures that underlying VM nodes are distributed evenly across all availability zones but does not guarantee even distribution of app instances. If an app instance fails because its located zone goes down, Azure Spring Apps creates a new app instance for this app on nodes in other available zone. In extreme cases, if there is only one VM under Azure Spring Apps and the app instance fails because its located zone goes down, Azure Spring Apps creates a new VM in other availability zone and creates a new app instance for this app on the new VM node.
+- Zone redundancy ensures that underlying VM nodes are distributed evenly across all availability zones but does not guarantee even distribution of app instances. If an app instance fails because its located zone goes down, Azure Spring Apps creates a new app instance for this app on nodes in other available zone.
 - Geo-disaster recovery is not the purpose of zone redundancy. To protect your service from regional outages, see the [Customer-managed geo-disaster recovery](#customer-managed-geo-disaster-recovery) section later in this article. 
 
 ## Create an Azure Spring Apps instance with zone redundancy enabled