Update migrate-v3-0-to-v3-1.md

Author: zhouwangzw

articles/cognitive-services/Speech-Service/migrate-v3-0-to-v3-1.md

@@ -44,6 +44,8 @@ In the [Transcriptions_Create](https://eastus.dev.cognitive.microsoft.com/docs/s
 
 The `filter` property is added to the [Transcriptions_List](https://eastus.dev.cognitive.microsoft.com/docs/services/speech-to-text-api-v3-1/operations/Transcriptions_List), [Transcriptions_ListFiles](https://eastus.dev.cognitive.microsoft.com/docs/services/speech-to-text-api-v3-1/operations/Transcriptions_ListFiles), and [Projects_ListTranscriptions](https://eastus.dev.cognitive.microsoft.com/docs/services/speech-to-text-api-v3-1/operations/Projects_ListTranscriptions) operations. The `filter` expression can be used to select a subset of the available resources. You can filter by `displayName`, `description`, `createdDateTime`, `lastActionDateTime`, `status`, and `locale`. For example: `filter=createdDateTime gt 2022-02-01T11:00:00Z`
 
+If you use webhook to receive notifications about transcription status, please note that the webhooks created via V3.0 API cannot receive notifications for V3.1 transcription requests. You need to create a new webhook endpoint via V3.1 API in order to receive notifications for V3.1 transcription requests.
+
 ## Custom Speech
 
 ### Datasets