[ACA] Edit private endpoint tutorial to note TCP not supported.

Author: v-jaswel

articles/container-apps/how-to-use-private-endpoint.md

@@ -17,6 +17,8 @@ In this article, you learn how to use a private endpoint to securely access your
 
 A private endpoint uses a private IP address from your virtual network (VNet). This endpoint connects you privately and securely to a service powered by [Azure Private Link](/azure/private-link/private-link-overview).
 
+Private endpoints on Azure Container Apps only support inbound HTTP traffic. TCP traffic is not supported.
+
 ::: zone pivot="azure-portal"
 
 ## Prerequisites