also add a note to the Recent Highlights section.

Author: BrianMouncer

articles/ai-services/speech-service/releasenotes.md

@@ -19,8 +19,7 @@ Azure AI Speech is updated on an ongoing basis. To stay up-to-date with recent d
 
 ## Recent highlights
 
-* Speech SDK 1.31.0 was released in August 2023.
-    * Real-time diarization is in public preview.  
+* Speech SDK 1.32.1 was released in September 2023.
 * Speech to text and text to speech container versions were updated in March 2023.
 * Some Speech Studio [scenarios](speech-studio-overview.md#speech-studio-scenarios) are available to try without an Azure subscription.
 * Custom Speech to text container disconnected mode was released in January 2023.