fix the MIT license bagde

Signed-off-by: Upekshe (its me) <upekshejay@gmail.com>

Author: Upekshe

README.md

@@ -1,6 +1,6 @@
 # Simple LDAP Auth Server
 
-[![MIT License](https://img.shields.io/apm/l/atomic-design-ui.svg?)](https://github.com/tterb/atomic-design-ui/blob/master/LICENSEs)
+[![MIT License](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)
 [![Version](https://badge.fury.io/gh/tterb%2FHyde.svg)](https://badge.fury.io/gh/tterb%2FHyde)
 [![Maintenance](https://img.shields.io/badge/Maintained%3F-yes-green.svg)](https://github.com/Upekshe/simple-ldap-server/graphs/commit-activity)