Update vnet-custom.md

You can now use a CIDR range of /23 **or larger**. Updating doc to reflect this.

Author: gabesmsft

articles/container-apps/vnet-custom.md

@@ -21,7 +21,7 @@ The following example shows you how to create a Container Apps environment in an
 [!INCLUDE [container-apps-create-portal-steps.md](../../includes/container-apps-create-portal-steps.md)]
 
 > [!NOTE]
-> Network address prefixes requires a CIDR range of `/23`.
+> Network address prefixes requires a CIDR range of `/23` or larger (`/23`, `/22` etc.).
 
 7. Select the **Networking** tab to create a VNET.
 8. Select **Yes** next to *Use your own virtual network*.
@@ -78,7 +78,7 @@ $VnetName = 'my-custom-vnet'
 Now create an Azure virtual network to associate with the Container Apps environment. The virtual network must have a subnet available for the environment deployment.
 
 > [!NOTE]
-> You can use an existing virtual network, but a dedicated subnet with a CDIR range of `/23` is required for use with Container Apps.
+> You can use an existing virtual network, but a dedicated subnet with a CIDR range of `/23` or larger is required for use with Container Apps.
 
 # [Bash](#tab/bash)