A bit more changes for the logo.

README.md

 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
-# ![prescott logo](./images/logo-2.png)
+# ![prescott logo](./images/logo-1.png)
 # PRESCOTT: Population awaRe Epistatic and StruCtural mOdel of muTational effecTs                                                                                                             
 
 ## Introduction