Update networking.md Private Endpoint GA

Reoving preview word for private endpoints as they went GA in build.

Author: bhanuprakash-1

articles/container-apps/networking.md

@@ -285,7 +285,7 @@ In order to create private endpoints on your Azure Container App environment, pu
 
 Azure networking policies are supported with the public network access flag.
 
-### <a name="private-endpoint"></a>Private endpoint (preview)
+### <a name="private-endpoint"></a>Private endpoint
 
 Azure private endpoint enables clients located in your private network to securely connect to your Azure Container Apps environment through Azure Private Link. A private link connection eliminates exposure to the public internet. Private endpoints use a private IP address in your Azure virtual network address space.