Add note in docs

DOCUMENTATION.md

@@ -70,6 +70,9 @@ By default, Statamic Redirect will also keep individual hits for each error, you
 
 By default, Statamic Redirect will create redirects when the URI of an entry changes. You can disable this by setting the `create_entry_redirects` config value to `false`.
 
+> **Note**
+> If this entry has any children in a structure, it will only create a redirect for the entry that was changed. None of its children.
+
 ## Deleting entry conflicting redirects
 
 By default, Statamic Redirect will delete redirects when a saved entry's URI conflicts with the redirect. You can disable this by setting the `delete_conflicting_redirects` config value to `false`.