Update articles/container-apps/disaster-recovery.md

Author: craigshoemaker

articles/container-apps/disaster-recovery.md

@@ -33,7 +33,7 @@ Additionally, the following resources can help you create your own disaster reco
 
 ## Set up zone redundancy in your Container Apps environment
 
-To take advantage of availability zones, you must enable zone redundancy when you create the Container Apps environment.  The environment must include a virtual network (VNET) with an infrastructure subnet.  To ensure proper distribution of replicas, you should configure your app's minimum and maximum replica count with values that are divisible by three.  The minimum replica count should be at least three.
+To take advantage of availability zones, you must enable zone redundancy when you create the Container Apps environment.  The environment must include a virtual network (VNET) with an available subnet.  To ensure proper distribution of replicas, you should configure your app's minimum and maximum replica count with values that are divisible by three.  The minimum replica count should be at least three.
 
 ### Enable zone redundancy via the Azure portal