Merge pull request RyanNielson#1 from JohnTube/unity-tips-link-fixed

updated Unity tips videos URL

Author: JohnTube

README.md

@@ -121,7 +121,7 @@ A list of awesome projects made using Unity.
 ## Tips and Tricks
 
 * [Editor Tips](http://imgur.com/a/2w7zd) - Tips in gif form showing a few ways to use the editor more efficiently.
-* [Unity Tips](http://unity3d.com/learn-topic/tips) - Short videos showing some handy tips when using Unity.
+* [Unity Tips](https://unity3d.com/learn/tutorials/topics/tips) - Short videos showing some handy tips when using Unity.
 
 ## Tutorials