update README

Author: silverhack

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <img src="https://user-images.githubusercontent.com/5271640/181045413-1d17333c-0533-404a-91be-2070ccc6ee29.png" style="max-width: 100%; height: auto; max-height: 350px;/>
+  <img src="https://user-images.githubusercontent.com/5271640/181045413-1d17333c-0533-404a-91be-2070ccc6ee29.png" style="max-width: 100%; height: auto; max-height: 350px;">
 </p>
 <p align="center">
   <a href="https://github.com/silverhack/monkey365"><img alt="License" src="https://img.shields.io/github/license/silverhack/monkey365"></a>