fix: typo

Author: OptiJava

README-en.md

@@ -2,7 +2,7 @@
 
 Language: English | [中文](https://github.com/OptiJava/OptCarpetAddition/blob/master/README.md)
 
-> This is an extension module of `Carpet`. The goal is to add some functions that do not greatly change the original game
+> This is an extension mod of `Carpet`. The goal is to add some functions that do not greatly change the original game
 mechanism but optimize the player experience.
 
 Build with [Preprocessor](https://github.com/ReplayMod/preprocessor)