add ms.service

Author: ShawnKupfer

learn-pr/data-ai-cert/data-warehouse-security/index.yml

@@ -7,6 +7,7 @@ metadata:
   author: wwlpublish
   ms.author: anrudduc
   ms.topic: module
+  ms.service: azure-synapse-analytics
 title: Data warehouse security
 summary: Learn about the security controls that Azure Synapse Analytics provides to help secure your data warehouse infrastructure and the data that's stored in it.
 hidden: true