Update whats-new.md

Author: rlitinsky

ATPDocs/whats-new.md

@@ -24,7 +24,7 @@ For updates about versions and features released six months ago or earlier, see
 
 ## May 2025
 
-###  Expanded New Sensor Deployment Support for Domain Controllers
+###  Expanded New Sensor Deployment Support for Domain Controllers (Preview)
 Defender for Identity now supports deploying its new sensor on Domain Controllers without requiring Defender for Endpoint onboarding. This simplifies sensor activation and expands deployment flexibility. [Learn more](deploy/activate-capabilities.md)