Fix acrolinx score

Author: garchiro7

articles/communication-services/how-tos/ui-library-sdk/includes/setup-title-subtitle/android.md

@@ -10,7 +10,7 @@ ms.service: azure-communication-services
 
 ## Customize title and subtitle
 
-To set and update call screen header `title` and `subtitle`, utilize `CallCompositeCallScreenOptions` to configure `CallCompositeCallScreenHeaderOptions`. Default UI library title will be displayed if `title` value is not configured.
+To set and update call screen header `title` and `subtitle`, utilize `CallCompositeCallScreenOptions` to configure `CallCompositeCallScreenHeaderOptions`. Default UI library title is displayed if `title` value isn't configured.
 
 #### [Kotlin](#tab/kotlin)
 

articles/communication-services/how-tos/ui-library-sdk/includes/setup-title-subtitle/ios.md

@@ -10,7 +10,7 @@ ms.service: azure-communication-services
 
 ## Customize title and subtitle
 
-To set and update call screen infoHeader `title` & `subtitle`, we have `CallScreenHeaderOptions` to configure and pass to `CallScreenOptions` by param `headerOptions`. The `title`, `Subtitle` in `CallScreenHeaderOptions` are optional parameters and `headerOptions` itself is optional as well.
+To set and update call screen infoHeader `title` & `subtitle`, we have `CallScreenHeaderOptions` to configure and pass to `CallScreenOptions` by param `headerOptions`. The `title`, `Subtitle` in `CallScreenHeaderOptions` are optional parameters and `headerOptions` itself is optional as well. Default UI library title is displayed if `title` value isn't configured.
 
 ```swift
 var callScreenHeaderOptions = CallScreenHeaderOptions(