Update live-streaming-overview.md

Author: Juliako

articles/media-services/latest/live-streaming-overview.md

@@ -59,7 +59,7 @@ When using the pass-through **Live Event**, you rely on your on-premises live en
 
 When using cloud encoding with Media Services, you would configure your on-premises live encoder to send a single bitrate video as the contribution feed (up to 32Mbps aggregate) to the Live Event (using RTMP or fragmented-MP4 input protocol). The Live Event transcodes the incoming single bitrate stream into [multiple bitrate video streams](https://en.wikipedia.org/wiki/Adaptive_bitrate_streaming) at varying resolutions to improve delivery and makes it available for delivery to playback devices via industry standard protocols like MPEG-DASH, Apple HTTP Live Streaming (HLS), and Microsoft Smooth Streaming. 
 
-### Live transcription
+### Live transcription (preview)
 
 Live transcription is a feature you can use with Live Events that are either pass-through or live encoding. For more information, see [live transcription](live-transcription.md). When this feature is enabled, the service uses the [Speech-To-Text](../../cognitive-services/speech-service/speech-to-text.md) feature of Cognitive Services to transcribe the spoken words in the incoming audio into text. This text is then made available for delivery along with video and audio in MPEG-DASH and HLS protocols.