Update README.md

Author: jp-netsis

README.md

@@ -14,7 +14,7 @@ You need to have `TextMeshPro` plugin in your project. You can install TMPro via
 
 I checked Unity and TextMeshPro Version are below.
 
-UnityVer:2020.3.17f1 
+UnityVer:2021.3.0f1 
 
 TextMeshProVer:3.0.6