Update README.md

Author: onurtnrkl

README.md

@@ -2,7 +2,8 @@
 Unity3D Script Header adds license to your new script.
 
 ## Usage
-Install ScriptHeader.unitypackage to your project.
+* [Download package](https://github.com/onurtnrkl/unity3d-script-header/releases) from releases.
+* Install ScriptHeader.unitypackage to your project.
 
 ## Example
 ```cs