Changed the headings

Author: RavikumarAkuthotaSf4250

MAUI/AIAssistView/items.md

@@ -428,7 +428,7 @@ The `SfAIAssistView` control includes a built-in event called [CardTapped](https
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-## Show error response UI
+## Show error response
 
 The `SfAIAssistView` allows to display error responses by setting the text to the `ErrorMessage`, ensuring clear notification when an error occurs during AI interactions.