Fix YouTube link in README

Author: KSemenenko

README.md

@@ -29,7 +29,7 @@
 </p>
 
 <p align="center">
-  <a href="https://www.youtube.com/@managedcode">
+  <a href="https://www.youtube.com/@managed-code">
     <img src="https://img.shields.io/badge/YouTube-Subscribe-red?style=for-the-badge&logo=youtube" />
   </a>
 </p>