Update 02-configuration.md

Author: mfaizanse

docs/user/02-configuration.md

@@ -27,7 +27,7 @@ Use the following sample CRs as guidance. Each can be applied immediately when y
 
 ## High availability
 
-NATS Servers are set up across multiple Availability Zones for uninterrupted operation and uptime. To achieve this, a minimum of three Kubernetes nodes must be distributed across at-least 3 Availability zones. Failure to meet this requirement will result in NATS Servers being scheduled within the same Availability zone, compromising high availability.
+NATS Servers are set up across different Availability Zones for uninterrupted operation and uptime. To achieve this, a minimum of three Kubernetes nodes must be distributed across at-least 3 Availability zones. Failure to meet this requirement will result in NATS Servers being scheduled within the same Availability zone, compromising high availability.
 
 ## Reference