Update plugin.py

Author: wj-Mcat

src/wechaty/plugin.py

@@ -431,7 +431,7 @@ def set_item_hooks(_: str, __: Any, value: dict) -> None:
     def _save_setting(self, value: dict) -> None:
         """update the plugin setting"""
         with open(self.setting_file, 'w', encoding='utf-8') as f:
-            json.dump(value, f, ensure_ascii=True)
+            json.dump(value, f, ensure_ascii=False)
 
     @setting.setter     # type: ignore
     def setting(self, value: dict) -> None: