Update README.md

Author: atalantus

README.md

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 This Unity example project utilizes the wave-function-collapse algorithm to procedurally generate levels.
 
 ## About this project
+Using Unity version `2019.1.14f1`.
 
 ## Resources
 Special thanks to [Oskar Stålberg](https://twitter.com/OskSta) for [his talk](https://www.youtube.com/watch?v=0bcZb-SsnrA) about this algorithm and it's implementation in the game Bad North.