Update README.md

Author: paseb

README.md

@@ -1,6 +1,8 @@
 # Mixed Reality Design Labs
 This repo is where Microsoft's Windows Mixed Reality Design team publishes examples and explorations. The goal is to inspire creators and help them to build Mixed Reality experiences. We share sample app projects here that demonstrate how to use various types of common controls and patterns in Mixed Reality. Find out details about common controls and sample apps on https://developer.microsoft.com/en-us/windows/mixed-reality/design
 
+# Unity Compatibility
+The current supported version of Unity is **Unity 2017**.  If you are looking to have support for previous versions of Unity you can sync to previous commits.
 
 # Important: Adding submodule MRDesignLab
 As soon as you clone the repo, init and update submodule with git command: