update file naming

README.md

@@ -425,7 +425,7 @@ OWL includes an intuitive web-based user interface that makes it easier to inter
 python run_app_zh.py
 
 # Start the English version
-python run_app_en.py
+python run_app.py
 ```
 
 ## Features

README_zh.md

@@ -417,7 +417,7 @@ OWL 现在包含一个基于网页的用户界面，使与系统交互变得更
 python run_app_zh.py
 
 # 英文版本
-python run_app_en.py
+python run_app.py
 ```
 
 网页界面提供以下功能：