Update README.md

Author: zoltanszogyenyi

README.md

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 # [Pixel Bootstrap 5 UI Kit](https://demo.themesberg.com/pixel-bootstrap-5-ui-kit/) [![Tweet](https://img.shields.io/twitter/url/http/shields.io.svg?style=social&logo=twitter)](https://twitter.com/intent/tweet?url=https%3A%2F%2Fgithub.com%2Fthemesberg%2Fpixel-bootstrap-ui-kit&via=themesberg&text=Kick-start%20development%20with%20Pixel%20Bootstrap%20UI%20Kit&hashtags=bootstrap%2C%20ui%20kit)
 
- ![version](https://img.shields.io/badge/version-3.1.2-blue.svg) ![license](https://img.shields.io/badge/license-MIT-blue.svg) [![GitHub issues open](https://img.shields.io/github/issues/themesberg/pixel-bootstrap-ui-kit.svg?maxAge=2592000)](https://github.com/themesberg/pixel-bootstrap-ui-kit/issues?q=is%3Aopen+is%3Aissue) [![GitHub issues closed](https://img.shields.io/github/issues-closed-raw/themesberg/pixel-bootstrap-ui-kit.svg?maxAge=2592000)](https://github.com/themesberg/pixel-bootstrap-ui-kit/issues?q=is%3Aissue+is%3Aclosed)
+ ![version](https://img.shields.io/badge/version-4.0.0-blue.svg) ![license](https://img.shields.io/badge/license-MIT-blue.svg) [![GitHub issues open](https://img.shields.io/github/issues/themesberg/pixel-bootstrap-ui-kit.svg?maxAge=2592000)](https://github.com/themesberg/pixel-bootstrap-ui-kit/issues?q=is%3Aopen+is%3Aissue) [![GitHub issues closed](https://img.shields.io/github/issues-closed-raw/themesberg/pixel-bootstrap-ui-kit.svg?maxAge=2592000)](https://github.com/themesberg/pixel-bootstrap-ui-kit/issues?q=is%3Aissue+is%3Aclosed)
 
 <a href="https://demo.themesberg.com/pixel-bootstrap-5-ui-kit/">
  <img src="https://themesberg.s3.us-east-2.amazonaws.com/public/products/pixel-lite/github/pixel-lite-preview.gif" alt="Pixel Bootstrap 5 UI Kit Preview"/>