change date

Author: diberry

articles/cognitive-services/LUIS/luis-concept-data-alteration.md

@@ -9,7 +9,7 @@ ms.custom: seodec18
 ms.service: cognitive-services
 ms.subservice: language-understanding
 ms.topic: conceptual
-ms.date: 09/26/2019
+ms.date: 11/19/2019
 ms.author: diberry
 ---