Update stack-navigator.md

Author: kazuma0129

versioned_docs/version-6.x/stack-navigator.md

@@ -459,7 +459,7 @@ Replaces the current screen with a new screen in the stack. The method accepts f
 - `params` - _object_ - Screen params to pass to the destination route.
 
 ```js
-navigation.push('Profile', { owner: 'Michaś' });
+navigation.replace('Profile', { owner: 'Michaś' });
 ```
 
 #### `push`