refresh tutorial

Author: KingdomOfEnds

articles/digital-twins/tutorial-facilities-udf.md

@@ -8,7 +8,7 @@ manager: bertvanhoof
 ms.custom: seodec18
 ms.service: digital-twins
 ms.topic: tutorial 
-ms.date: 11/13/2019
+ms.date: 01/10/2020
 #Customer intent: As an Azure IoT developer, I want to walk through a sample application to monitor a space using Azure Digital Twins. 
 ---