docs: Update breaking changes information (#733)

Co-authored-by: Dimo Dimov <dimo@Dimos-MacBook-Pro.local>

Author: github-actions[bot]

upgrade/breaking-changes/3-0-0.md

@@ -429,7 +429,7 @@ We are making our API naming more consistent.
 
 ## Rendering and Themes
 
--  HTML classes and DOM element hierarchy will be updated for Buttons, Inputs, Selects, DatePickers Checkbox, Switch.
+>important The [HTML rendering and CSS classes have been updated for multiple components](https://www.telerik.com/blogs/improvements-coming-telerik-kendo-ui-themes-2022), including Buttons, Textbox components, Dropdown components, Date/Time Pickers, Checkbox, Switch. [Recreate any custom themes]({%slug themes-custom%}) via [import]({%slug themes-custom%}#import-custom-theme) or [from scratch]({%slug themes-custom%}#using-the-sass-theme-builder).
 
 ### CSS Classes for State
 
@@ -499,6 +499,6 @@ The `k-widget` CSS class was removed from all components. If you use this class
 
 ## REPL Changes
 
-<a href = "https://blazorrepl.telerik.com/" target = "_blank"> Telerik REPL for Blazor </a> integrates 3.0.0 version of Telerik.UI.for.Blazor.
+<a href = "https://blazorrepl.telerik.com/" target = "_blank">Telerik REPL for Blazor</a> always uses the latest official version of the `Telerik.UI.for.Blazor` NuGet package.
 
->important Any snippet created before 3.0.0 that uses the Telerik UI for Blazor might need an update due to the above list of component changes.
+>important Any snippet created before `Telerik.UI.for.Blazor` version 3.0 (January 19, 2022) may need an update due to the above list of changes.