Update notes on <lang xml:lang> element usage

Removed notes about incompatibility and limitations of the <lang xml:lang> element with SSML features. They're well supported now.

Author: ForrestGumb

articles/ai-services/speech-service/speech-synthesis-markup-voice.md

@@ -269,8 +269,6 @@ The following table describes the usage of the `<lang xml:lang>` element's attri
 | `xml:lang`    | The language that you want the neural voice to speak. | Required to adjust the speaking language for the neural voice. If you're using `lang xml:lang`, the locale must be provided. |
 
 > [!NOTE]
-> The `<lang xml:lang>` element is incompatible with the `prosody` and `break` elements. You can't adjust pause and prosody like pitch, contour, rate, or volume in this element.
->
 > Non-multilingual voices don't support the `<lang xml:lang>` element by design.
 
 ### Multilingual voices with the lang element
@@ -283,9 +281,6 @@ Use the [multilingual voices section](language-support.md?tabs=tts#multilingual-
 
 <sup>1</sup> Those are neural multilingual voices in Azure AI Speech. All multilingual voices can speak in the language in default locale of the input text without [using SSML](#adjust-speaking-languages). However, you can still use the `<lang xml:lang>` element to adjust the speaking accent of each language to set preferred accent such as British accent (`en-GB`) for English. The prefix in each voice name indicates its primary locale; for example, the primary locale for `en-US-AndrewMultilingualNeural` is `en-US`.
 
-> [!NOTE] 
-> Multilingual voices don't fully support certain SSML elements, such as `break`, `emphasis`, `silence`, and `sub`.
-
 ### Lang examples
 
 For information about the supported values for attributes of the `lang` element, see [Adjust speaking language](#adjust-speaking-languages).