Add Aspire Dashboard application rule.

Author: v-jaswel

articles/container-apps/using-azure-firewall.md

@@ -40,6 +40,7 @@ Application rules allow or deny traffic based on the application layer. The foll
 | Azure Container Registry (ACR) | *Your-ACR-address*, `*.blob.core.windows.net`, `login.microsoft.com` | These FQDNs are required when using Azure Container Apps with ACR and Azure Firewall. |
 | Azure Key Vault | *Your-Azure-Key-Vault-address*, `login.microsoft.com` | These FQDNs are required in addition to the service tag required for the network rule for Azure Key Vault. |
 | Managed Identity | `*.identity.azure.net`, `login.microsoftonline.com`, `*.login.microsoftonline.com`, `*.login.microsoft.com` | These FQDNs are required when using managed identity with Azure Firewall in Azure Container Apps.
+| Aspire Dashboard | `https://northcentralus.ext.azurecontainerapps.dev` | This FQDN is required when using Aspire dashboard in an environment configured with a virtual network. |
 | Docker Hub Registry | `hub.docker.com`, `registry-1.docker.io`, `production.cloudflare.docker.com` | If you're using [Docker Hub registry](https://docs.docker.com/desktop/allow-list/) and want to access it through the firewall, you need to add these FQDNs to the firewall. |
 
 ## Network rules