Update README.md

Author: geoperez

README.md

@@ -11,7 +11,7 @@
 
 *:star: Please star this project if you find it useful!*
 
-**This README is for EmbedIO v2.x. Click [here](https://github.com/unosquare/embedio/tree/v1.X) if you are still sing EmbedIO v1.x.**
+**This README is for EmbedIO v2.x. Click [here](https://github.com/unosquare/embedio/tree/v1.X) if you are still using EmbedIO v1.x.**
 
 - [Overview](#overview)
     - [EmbedIO 2.0 - What's new](#embedio-20---whats-new)