Use blurple color

Author: kyb3r

README.md

@@ -24,7 +24,7 @@
 </a>
 
 <a href="https://github.com/kyb3r/modmail/">
-    <img src="https://img.shields.io/github/forks/kyb3r/modmail.svg?style=for-the-badge" alt="GitHub forks" />
+    <img src="https://img.shields.io/github/forks/kyb3r/modmail.svg?style=for-the-badge&colorB=7289DA" alt="GitHub forks" />
 </a>
 
 </div>