Corrected lang identifier.

Author: IEvangelist

articles/cognitive-services/Speech-Service/includes/how-to/speech-to-text-basics/speech-to-text-basics-javascript.md

@@ -240,7 +240,7 @@ phraseList.addPhrase("Supercalifragilisticexpialidocious");
 
 If you need to clear your phrase list:
 
-```csharp
+```javascript
 phraseList.clear();
 ```