Updating ingress-how-to.md for including steps on adding additional TCP ports via Azure Portal

The current 'ingress how-to' still mentions that adding additional TCP ports through the portal is not allowed. This is no longer the case.

This PR adds a screenshot and a few steps on the "azure-portal" tab on how to add additional ports

Author: Ajsalemo

articles/container-apps/ingress-how-to.md

@@ -203,7 +203,12 @@ type: Microsoft.App/containerApps
 
 ::: zone pivot="azure-portal"
 
-This feature isn't supported in the Azure portal.
+:::image type="content" source="media/ingress/additional-tcp-ingress-ports-portal.png" alt-text="Sceenshot of adding additional TCP ports for Container Apps ingress through the portal.":::
+
+1. Expand the **Additional TCP ports** section within the Ingress blade.
+2. Add in additional TCP ports that your application will be accepting traffic on in the _Target port_ field. If _Exposed port_ is left empty, this will take from the same value set in _Target port_.
+3. Change the _Ingress traffic_ field as needed. This will configure where ingress traffic will be limited to for each port.
+4. When finished, click **Save**.
 
 ::: zone-end