Update README.md

Author: adirel

README.md

@@ -6,6 +6,7 @@
 <img alt="Website" src="https://img.shields.io/website?style=flat-square&url=https://adirel.github.io">
 <img alt="GitHub top language" src="https://img.shields.io/badge/License-MIT-yellow.svg">
 <img alt="GitHub issues" src="https://img.shields.io/github/issues/adirel/adirel.github.io">
+<img alt="GitHub code size in bytes" src="https://img.shields.io/github/languages/code-size/adirel/adirel.github.io">
 </div>
 
 ## Usage