Update what-is-text-to-speech-avatar.md

Author: sally-baolian

articles/ai-services/speech-service/text-to-speech-avatar/what-is-text-to-speech-avatar.md

@@ -60,11 +60,11 @@ You can create custom text to speech avatars that are unique to your product or
 
 ## Sample code
 
-Sample code for text to speech avatar is available on GitHub. These samples cover the most popular scenarios:
+Sample code for text to speech avatar is available on [GitHub](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples). These samples cover the most popular scenarios:
 
-* [Batch synthesis (REST)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples)
-* [Real-time synthesis (SDK)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples/js/browser)
-* [Live chat with Azure Open AI in behind (SDK)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples/js/browser)
+* [Batch synthesis (REST)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples/batch-avatar)
+* [Real-time synthesis (SDK)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples/js/browser/avatar)
+* [Live chat with Azure Open AI in behind (SDK)](https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/samples/js/browser/avatar#chat-sample)
 
 ## Pricing