Fix typo

README.md

 git clone https://git.etud.insa-toulouse.fr/vergnet/pir-serious-game-ethics.git
 ```
 
-Open Godot, in the project manager, select `Import`, choose the `project.godot` file in previously the cloned repo then click `Import & Edit`. You can start editing the game! 
+Open Godot, in the project manager, select `Import`, choose the `project.godot` file in the previously cloned repo then click `Import & Edit`. You can start editing the game! 
 
 ## Resources