update bootstrap version README.md

README.md

@@ -5,7 +5,7 @@
 [![cdn version](https://data.jsdelivr.com/v1/package/npm/admin-lte/badge)](https://www.jsdelivr.com/package/npm/admin-lte)
 [![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/from-referrer/)
 
-**AdminLTE** is a fully responsive administration template. Based on **[Bootstrap 4.5](https://getbootstrap.com/)** framework and also the JS/jQuery plugin.
+**AdminLTE** is a fully responsive administration template. Based on **[Bootstrap 4.6](https://getbootstrap.com/)** framework and also the JS/jQuery plugin.
 Highly customizable and easy to use. Fits many screen resolutions from small mobile devices to large desktops.
 
 **Preview on [AdminLTE.io](https://adminlte.io/themes/v3)**