Update real-time-synthesis-avatar.md

Author: sally-baolian

articles/ai-services/speech-service/text-to-speech-avatar/real-time-synthesis-avatar.md

@@ -67,7 +67,7 @@ The default voice is the first voice returned per locale from the [voice list AP
 
 ## Select avatar character and style
 
-The supported avatar characters and styles can be found [here](avatar-gestures-with-ssml.md#supported-pre-built-avatar-characters-styles-and-gestures).
+The supported avatar characters and styles can be found [here](avatar-gestures-with-ssml.md#supported-prebuilt-avatar-characters-styles-and-gestures).
 
 The following code snippet shows how to set avatar character and style: