adds ms.service to remove build validation issue.

Author: kenwith

articles/virtual-network/virtual-network-encryption-faq.yml

@@ -3,6 +3,7 @@ metadata:
   title: Virtual Network encryption frequently asked questions
   description: Answers to common questions about using Azure Virtual Network encryption.
   ms.topic: faq
+  ms.service: azure-virtual-network
   ms.date: 05/13/2024
 
 title: Frequently asked questions for Azure Virtual Network encryption
@@ -50,4 +51,4 @@ sections:
 
       - question: Is asymmetric encryption supported for a scenario where one direction is encryption enabled and the reverse is encryption disabled?
         answer: |
-          Asymmetric encryption can happen when there is asymmetric routing and traffic is flowing encrypted in one direction and un-encrypted in the other direction. Asymmetric encryption is not supported and is not recommended.
+          Asymmetric encryption can happen when there is asymmetric routing and traffic is flowing encrypted in one direction and un-encrypted in the other direction. Asymmetric encryption is not supported and is not recommended.