Update call-transcription-web.md

Author: tomaschladek

articles/communication-services/how-tos/calling-sdk/includes/call-transcription/call-transcription-web.md

@@ -6,6 +6,9 @@ ms.date: 08/08/2024
 ms.author: tchladek
 ---
 
+> [!WARNING]
+> Due to changes in Microsoft Teams, JavaScript calling SDKs with versions 1.27 and lower stops Teams transcription and blocks Teams users to start transcription. If you would like to leverage Teams transcription in the calls and meetings, you need to upgrade your calling SDK to at least version 1.28.
+
 ## Call transcription 
 
 `Transcription` is an extended feature of the class `Call`. You first need to obtain the transcription feature API object