Update call-automation.md

added streaming and transcriptions to mid call actions list

Author: alvin-l-han

articles/communication-services/concepts/call-automation/call-automation.md

@@ -116,6 +116,11 @@ Your application can perform these actions on calls that are answered or placed
 
 **Cancel media operations** – Based on business logic your application might need to cancel ongoing and queued media operations. Depending on the media operation canceled and the ones in queue, your application might receive a webhook event indicating that the action was canceled. 
 
+**Start/Stop audio streaming (public preview)** - Audio streaming allows you to subscribe to real-time audio streams from an ongoing call.  For more detailed guidance on how to get started with audio streaming and information about audio streaming callback events, see our [concept](audio-streaming-concept.md) and our [quickstart](../../how-tos/call-automation/audio-streaming-quickstart.md).
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+**Start/Stop real-time transcription (public preview)** - Real-time transcription allows you to access live transcriptions for the audio of an ongoing call.  For more detailed guidance on how to get started with real-time transcription and information about real-time transcription callback events, see our [concept](real-time-transcription.md) and our [quickstart](../../how-tos/call-automation/real-time-transcription-tutorial.md).
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 ### Query scenarios
 
 **List participants** – Returns a list of all the participants in a call. Recording and transcription bots are omitted from this list.