Merge pull request #302 from ArcherAZ/patch-2

Update release-notes-stt.md

Author: prmerger-automator[bot]

articles/ai-services/speech-service/includes/release-notes/release-notes-stt.md

@@ -6,6 +6,11 @@ ms.date: 7/12/2024
 ms.author: eur
 ---
 
+### September 2024 release
+
+#### Fast transcription (Preview)
+Fast transcription now supports Diarization to recognize and separate multiple speakers on mono channel audio file. For more information, see [fast transcription API guide](../../fast-transcription-create.md#use-the-fast-transcription-api).
+
 ### August 2024 release
 
 #### Language learning (Preview)