chore: update version

Author: jivanova

_config.yml

@@ -550,7 +550,7 @@ baseurl: /blazor-ui
 enable_blazorRepl: true
 
 ## Latest UI for Blazor version. Used in some articles
-uiForBlazorLatestVersion: "2.27.0"
+uiForBlazorLatestVersion: "2.28.0"
 supportedFrameworkVersion: ".NET Core 3.1.11 and .NET 5"
 
 ## The Kendo UI version used