Update speech-container-ntts.md

Author: sally-baolian

articles/ai-services/speech-service/speech-container-ntts.md

@@ -184,7 +184,7 @@ For more information about `docker run` with Speech containers, see [Install and
 
 ### SSML voice element
 
-When you construct a neural text to speech HTTP POST, the [SSML](speech-synthesis-markup.md) message requires a `voice` element with a `name` attribute. The [locale of the voice](language-support.md?tabs=tts) must correspond to the locale of the container model. 
+When you construct a neural text to speech HTTP POST, the [SSML](speech-synthesis-markup.md) message requires a `voice` element with a `name` attribute. The [locale of the voice](language-support.md?tabs=tts) must correspond to the locale of the container model. Additionally, the neural text to speech container supports all SSML tags available for all Azure AI text to speech voices.
 
 For example, a model that was downloaded via the `latest` tag (defaults to "en-US") would have a voice name of `en-US-AriaNeural`.