chore: update version

Author: marin-bratanov

_config.yml

@@ -455,7 +455,7 @@ intro_columns:
 baseurl: /blazor-ui
 
 ## Latest UI for Blazor version. Used in some articles
-uiForBlazorLatestVersion: "2.21.0"
+uiForBlazorLatestVersion: "2.21.1"
 supportedFrameworkVersion: ".NET Core 3.1.11 and .NET 5"
 
 ## The Kendo UI version used