Fix a command line example issue in the documentation

Author: furkankaplan

README.md

@@ -24,7 +24,7 @@ You can check FKArchitectureGeneratorCLI out for details on [Medium story](https
 
  FKArchitectureGeneratorCLI add a mark as a default to each swift file indicating this module created with this cli. You can hide this mark by adding the flag -u/--unmarked
 
- `fk mvvm ModuleName -u` or `fk mvvm ModuleName -unmarked`
+ `fk mvvm ModuleName -u` or `fk mvvm ModuleName --unmarked`
 
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