Acro fix

Author: JamesJBarnett

articles/ai-services/speech-service/personal-voice-how-to-use.md

@@ -46,7 +46,7 @@ Here's example SSML in a request for text to speech with the voice name and the
 You can use the SSML via the [Speech SDK](./get-started-text-to-speech.md) or [REST API](rest-text-to-speech.md).
 
 * **Real-time speech synthesis**: Use the [Speech SDK](./get-started-text-to-speech.md) or [REST API](rest-text-to-speech.md) to convert text to speech.
-    * When you use Speech SDK, don't set Endpoint Id, just like prebuild voice.
+    * When you use Speech SDK, don't set Endpoint ID, just like prebuild voice.
     * When you use REST API, please use prebuilt neural voices endpoint.
 
 ## Supported and unsupported SSML elements for personal voice