Update add-ons-images with ap-southeast-6 (#1129)

Add ap-southeast-6, New Zealand, to the list of ECR registries used by EKS.

Author: naclonts

latest/ug/workloads/add-ons-images.adoc

@@ -33,6 +33,9 @@ When you deploy <<workloads-add-ons-available-eks,{aws} Amazon EKS add-ons>> to
 |ap-southeast-4
 |491585149902.dkr.ecr.ap-southeast-4.amazonaws.com
 
+|ap-southeast-6
+|333609536671.dkr.ecr.ap-southeast-6.amazonaws.com
+
 |ap-south-1
 |602401143452.dkr.ecr.ap-south-1.amazonaws.com
 
@@ -123,4 +126,4 @@ When you deploy <<workloads-add-ons-available-eks,{aws} Amazon EKS add-ons>> to
 |us-gov-west-1
 |013241004608.dkr.ecr.us-gov-west-1.amazonaws.com
 
-|===
+|===