use the logo from the main branch

Author: ofek-sha

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <img src="https://github.com/sweet-security/intern-mint/blob/5eab157452131b7bda044a95f349e660b3a44335/logo.png?raw=true" alt="intern-mint" width="350">
+  <img src="https://github.com/sweet-security/intern-mint/blob/main/logo.png?raw=true" alt="intern-mint" width="350">
 </p>
 
 [![version](https://img.shields.io/crates/v/intern-mint)](https://crates.io/crates/intern-mint) [![documentation](https://docs.rs/intern-mint/badge.svg)](https://docs.rs/intern-mint) [![downloads](https://img.shields.io/crates/d/intern-mint)](https://crates.io/crates/intern-mint)