Update semantic_segmentation.md

docs/train/semantic_segmentation.md

@@ -12,7 +12,7 @@ PaddleX目前提供了DeepLabv3p、UNet、HRNet和FastSCNN四种语义分割结
 | :----------------  | :------- | :------- | :---------  | :---------  | :-----    |
 | [DeepLabv3p-MobileNetV2-x0.25](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/deeplabv3p_mobilenetv2_x0.25.py) |  -  |  2.9MB  |  -   | -  |  模型小，预测速度快，适用于低性能或移动端设备   |
 | [DeepLabv3p-MobileNetV2-x1.0](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/deeplabv3p_mobilenetv2.py) |  69.8%  |  11MB  |  -   | -  |  模型小，预测速度快，适用于低性能或移动端设备   |
-| [DeepLabv3p-Xception65](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/deeplabv3p_xception65.pyy)        | 79.3%  | 158MB   |  -  | -  |  模型大，精度高，适用于服务端   |
+| [DeepLabv3p-Xception65](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/deeplabv3p_xception65.py)        | 79.3%  | 158MB   |  -  | -  |  模型大，精度高，适用于服务端   |
 | [UNet](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/unet.py)     | -  | 52MB   | -   | -  |  模型较大，精度高，适用于服务端   |
 | [HRNet](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/hrnet.py)   |  79.4%   |   37MB    |  -       |   -    | 模型较小，模型精度高，适用于服务端部署   |
 | [FastSCNN](https://github.com/PaddlePaddle/PaddleX/blob/develop/tutorials/train/semantic_segmentation/fast_scnn.py)   |  -   |   4.5MB    |  -       |   -    | 模型小，预测速度快，适用于低性能或移动端设备   |