Fix invalid metadata

Author: rwestMSFT

articles/cognitive-services/LUIS/includes/tutorial-start-in-build-section.md

@@ -2,14 +2,14 @@
 title: include file
 description: include file
 services: cognitive-services
-
 manager: nitinme
-ms.custom: seodec18
+ms.custom:
+- "seodec18"
+- "include file"
 ms.service: cognitive-services
 ms.subservice: language-understanding
 ms.date: 02/14/2020
 ms.topic: include
-ms.custom: include file
 
 ---