add missing zone pivot

Author: lilyjma

articles/azure-functions/durable/durable-task-scheduler/develop-with-durable-task-scheduler.md

@@ -495,8 +495,12 @@ First, follow instructions below to gain access to the [durable task scheduler d
 
 ::: zone-end 
 
+::: zone pivot="az-portal"
+
 [!INCLUDE [assign-dev-identity-rbac-portal](./includes/assign-dev-identity-rbac-portal.md)]
 
+::: zone-end 
+
 ## Auto scaling in Functions Premium plan 
 
 For durable task scheduler apps on the Functions Premium plan, enable the *Runtime Scale Monitoring* setting to get auto scaling of the app.