Sentinel - Update whats-new.md - add usx docset

Author: cwatson-cat

articles/sentinel/whats-new.md

@@ -4,7 +4,7 @@ description: Learn about the latest new features and announcement in Microsoft S
 author: yelevin
 ms.author: yelevin
 ms.topic: concept-article
-ms.date: 09/09/2024
+ms.date: 12/02/2024
 
 
 #Customer intent: As a security team member, I want to stay updated on the latest features and enhancements in Microsoft Sentinel so that I can effectively manage and optimize my organization's security posture.
@@ -22,6 +22,14 @@ The listed features were released in the last three months. For information abou
 
 [!INCLUDE [reference-to-feature-availability](includes/reference-to-feature-availability.md)]
 
+## December 2024
+
+- [New documentation library for Microsoft's unified security operations platform](#new-documentation-library-for-microsofts-unified-security-operations-platform)
+
+### New documentation library for Microsoft's unified security operations platform
+
+Find centralized documentation about [Microsoft's unified SecOps platform in the Microsoft Defender portal](/unified-secops-platform/overview-unified-security). Microsoft's unified SecOps platform brings together the full capabilities of Microsoft Sentinel, Microsoft Defender XDR, Microsoft Security Exposure Management, and generative AI. Learn about the features and functionality available with the Microsoft's unified SecOps platform, then start to plan your deployment.
+
 ## November 2024
 
 - [Microsoft Sentinel availability in Microsoft Defender portal](#microsoft-sentinel-availability-in-microsoft-defender-portal)