Update language-identification-model.md

Updates related to User Story 1601403: https://mseng.visualstudio.com/TechnicalContent/_workitems/edit/1601403.

Author: john-par

articles/media-services/video-indexer/language-identification-model.md

@@ -49,7 +49,7 @@ Model dominant language is available in the insights JSON as the `sourceLanguage
 * If the audio contains languages other than the supported list above, the result is unexpected.
 * If Video Indexer cannot identify the language with a high enough confidence (`>0.6`), the fallback language is English.
 * There is no current support for file with mixed languages audio. If the audio contains mixed languages, the result is unexpected. 
-* Low-quality audio caustic may impact the model results.
+* Low-quality audio may impact the model results.
 * The model requires at least one minute of speech in the audio.
 * The model is designed to recognize a spontaneous conversational speech (not voice commands, singing, etc.).