Update device-discovery.md

Defender Portal is no longer in preview

Author: LeandroRRocha

defender-endpoint/device-discovery.md

@@ -95,7 +95,7 @@ For more information, see [Network devices](network-devices.md).
 
 To address the challenge of gaining enough visibility to locate, identify, and secure your complete OT/IOT asset inventory Defender for Endpoint now supports the following integration:
 
-- **Microsoft Defender for IoT**: This integration combines Defender for Endpoint's device discovery capabilities with Microsoft Defender for IoT in the Microsoft Defender portal (Preview) to secure:
+- **Microsoft Defender for IoT**: This integration combines Defender for Endpoint's device discovery capabilities with Microsoft Defender for IoT in the Microsoft Defender portal to secure:
 
     - OT devices, such as servers or packaging systems. For more information, see [onboard Defender for IoT in the Defender portal](/defender-for-iot/get-started).
     - Enterprise IoT devices connected to an IT network (for example, Voice over Internet Protocol (VoIP), printers, and smart TVs). For more information, see [Get started with Enterprise IoT security](/defender-for-iot/enterprise-iot-get-started).