Updated TUTORIAL_EN.md to fix a little mistake

Changed the repeated module name `gate` with the module name `login`

TUTORIAL_EN.md

@@ -31,7 +31,7 @@ leaf.Run(
 )
 ```
 
-The modules of `game`, `gate` and `gate` are registered consecutively. They are required to implement a `Module` interface.
+The modules of `game`, `gate` and `login` are registered consecutively. They are required to implement a `Module` interface.
 
 ```go
 type Module interface {