Update README.md

Author: pablogs9

README.md

@@ -16,7 +16,7 @@ You can find the available precompiled ROS 2 types for messages and services in
 
 ## How to use the precompiled library
 
-Go to [link to release section]() and download the last release of micro-ROS library for Arduino. 
+Go to [link to release section](https://github.com/micro-ROS/micro_ros_arduino/releases) and download the last release of micro-ROS library for Arduino. 
 
 Include it in your proyect using `Sketch -> Include library -> Add .ZIP Library...`