Update readme to include unity 6.1

Author: JohannesDeml

README.md

@@ -2,9 +2,9 @@
 
 ![Preview](./preview.png)
 
-[![](https://img.shields.io/github/release-date/JohannesDeml/UnityWebGL-LoadingTest.svg)](https://github.com/JohannesDeml/UnityWebGL-LoadingTest/releases) [![Tested up to Unity 6](https://img.shields.io/badge/tested%20up%20to%20unity-6000.0-green.svg?logo=unity&cacheSeconds=2592000)](https://unity3d.com/get-unity/download/archive)
+[![](https://img.shields.io/github/release-date/JohannesDeml/UnityWebGL-LoadingTest.svg)](https://github.com/JohannesDeml/UnityWebGL-LoadingTest/releases) [![Tested up to Unity 6.1](https://img.shields.io/badge/tested%20up%20to%20unity-6000.1-green.svg?logo=unity&cacheSeconds=2592000)](https://unity3d.com/get-unity/download/archive)
 
-*Testing Unity's WebGL size and loading time for different versions (2018.4 - 6000.0) and settings*
+*Testing Unity's WebGL size and loading time for different versions (2018.4 - 6000.1) and settings*
 
 * [Overview page of all builds](https://deml.io/experiments/unity-webgl/)
 * [Implementation in Godot](https://github.com/JohannesDeml/Godot-Web-LoadingTest)