chore(version): update the product version in docs

Author: svdimitr

_config.yml

@@ -535,7 +535,7 @@ intro_columns:
 baseurl: /blazor-ui
 
 ## Latest UI for Blazor version. Used in some articles
-uiForBlazorLatestVersion: "2.25.0"
+uiForBlazorLatestVersion: "2.26.0"
 supportedFrameworkVersion: ".NET Core 3.1.11 and .NET 5"
 
 ## The Kendo UI version used