Update README.md

README.md

@@ -20,7 +20,7 @@ First, you have to set up a development environment:
 
 1. Install [Unity](https://unity3d.com/de/get-unity/download) 2020.3.x (LTS) via the Unity Hub.
 
-   We periodically update to the latest LTS version. Currently, any 2019.4 version should work; you can safely ignore any version warnings popping up.
+   We periodically update to the latest LTS version. Currently, any 2020.3 version should work; you can safely ignore any version warnings popping up.
    
    Make sure to [activate your license](https://support.unity.com/hc/en-us/articles/211438683-How-do-I-activate-my-license).