Updates to speech sdk release notes: link to conversation transcription quickstart and mention of Objective-C/Swift support for CT.

Author: Marko Hietala

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

@@ -10,7 +10,7 @@ ms.author: eur
 
 #### New Features
 
-* Support for [real-time diarization](../../get-started-stt-diarization.md) is available in public preview with the Speech SDK 1.31.0. This feature is available in the following SDKs: C#, C++, Java, JavaScript, and Python. 
+* Support for [real-time diarization](../../get-started-stt-diarization.md) is available in public preview with the Speech SDK 1.31.0. This feature is available in the following SDKs: C#, C++, Java, JavaScript, Python and Objective-C/Swift.
 
 * Synchronized speech synthesis word boundary and viseme events with audio playback
 
@@ -40,6 +40,8 @@ This table shows the previous and new object names for real-time diarization and
 
 * **CSharp**
 
+    * [New C# conversation transcription quickstart](https://github.com/Azure-Samples/cognitive-services-speech-sdk/blob/master/quickstart/csharp/dotnet/conversation-transcription/README.md)
+
     * [New C# meeting transcription quickstart](https://github.com/Azure-Samples/cognitive-services-speech-sdk/blob/master/quickstart/csharp/dotnet/meeting-transcription/README.md)
 
 * **JavaScript**