Update app.py

app.py

@@ -107,7 +107,7 @@ if __name__ == '__main__':
                                    interactive=True,
                                    info='[0, 1.0]')
 
-        gr.Markdown('**[模型选择](https://github.com/RapidAI/RapidOCR/blob/main/docs/models.md)**')
+        gr.Markdown('**[模型选择](https://github.com/RapidAI/RapidOCR/blob/main/docs/models.md)** (模型转换→[PaddleOCRModelConverter](https://github.com/RapidAI/PaddleOCRModelConverter))')
         with gr.Row():
             text_det = gr.Dropdown(['ch_PP-OCRv3_det_infer.onnx',
                                     'ch_PP-OCRv2_det_infer.onnx',