README auto update [skip ci]

Author: DevExpressExampleBot

readme.md

@@ -1,5 +1,5 @@
 <!-- default badges list -->
-![](https://img.shields.io/endpoint?url=https://codecentral.devexpress.com/api/v1/VersionRange/400503150/21.1.5%2B)
+![](https://img.shields.io/endpoint?url=https://codecentral.devexpress.com/api/v1/VersionRange/400503150/21.2.1%2B)
 [![](https://img.shields.io/badge/Open_in_DevExpress_Support_Center-FF7200?style=flat-square&logo=DevExpress&logoColor=white)](https://supportcenter.devexpress.com/ticket/details/T1032999)
 [![](https://img.shields.io/badge/📖_How_to_use_DevExpress_Examples-e9f6fc?style=flat-square)](https://docs.devexpress.com/GeneralInformation/403183)
 <!-- default badges end -->