Update README.md

README.md

@@ -170,7 +170,7 @@ print(response.json()["choices"][0]["message"]["content"])
 
 ```
 .
-├── app_gradio.py          # Main Gradio interface
+├── app.py          # Main Gradio interface
 ├── README.md              # Project documentation
 └── requirements.txt       # Dependencies (gradio, requests)
 ```