[ACA] Fix subnet configuration section.

Author: v-jaswel

articles/container-apps/networking.md

@@ -204,7 +204,7 @@ As a Container Apps environment is created, you provide resource IDs for a singl
 
 If you're using the CLI, the parameter to define the subnet resource ID is `infrastructure-subnet-resource-id`. The subnet hosts infrastructure components and user app containers.
 
-If you're using the Azure CLI with a Consumption only environment and the [platformReservedCidr](vnet-custom-internal.md#networking-parameters) range is defined, both subnets must not overlap with the IP range defined in `platformReservedCidr`.
+If you're using the Azure CLI with a Consumption only environment and the [platformReservedCidr](vnet-custom-internal.md#networking-parameters) range is defined, the subnet must not overlap with the IP range defined in `platformReservedCidr`.
 
 ## Routes