Add note about workspace-based gateways and connectivity

Clarify that workspace-based gateways are not affected by the retirement of trusted service connectivity.

Author: tomkerkhove

articles/api-management/breaking-changes/trusted-service-connectivity-retirement-march-2026.md

@@ -54,6 +54,8 @@ If your API Management service has an established networking line of sight to th
 
 For backup and restore and custom hostname certificates, you need to ensure the target key vault or storage account is publicly accessible or you need to preserve its trusted connectivity setting to allow traffic from API Management resources, even if your API Management service has a networking line of sight established with it.
 
+If you are using workspace-based gateways, you are not affected given they do not support managed identity.
+
 ### Step 1: Does my API Management gateway rely on trusted service connectivity? 
 
 Your API Management gateway should no longer rely on trusted service connectivity to Azure services. Instead, it should establish a networking line of sight.