Update unified-soc-preview.md

Author: batamig

articles/sentinel/includes/unified-soc-preview.md

@@ -1,6 +1,6 @@
 ---
-title: "include file" 
-description: "include file" 
+title: Defender portal announcement with syntax
+description: Describes the current announcement for Microsoft Sentinel in the Defender portal in an admon format.
 services: microsoft-sentinel
 author: batamig
 ms.topic: "include"