docs: clarify use of hasOption()

`hasOption()` does not check whether the command has been _called_ with the given option, but rather whether the command even _accepts_ the option.

src/Illuminate/Console/Concerns/InteractsWithIO.php

@@ -95,7 +95,7 @@ public function arguments()
     }
 
     /**
-     * Determine if the given option is present.
+     * Determine whether the option exists for the command.
      *
      * @param  string  $name
      * @return bool