Fix docs. (#1134)

demo/auto_compression/semantic_segmentation/README.md

@@ -104,7 +104,7 @@ python -m paddle.distributed.launch run.py \
     --model_filename='model.pdmodel' \
     --params_filename='model.pdiparams' \
     --save_dir='./save_model' \
-    --config_path='configs/pp_humanseg_auto.yaml'
+    --config_path='configs/pp_humanseg_auto.yaml' \
     --deploy_hardware='SD710'
 ```
 - 自行配置稀疏参数进行非结构化稀疏和蒸馏训练，配置参数含义详见[自动压缩超参文档](https://github.com/PaddlePaddle/PaddleSlim/blob/27dafe1c722476f1b16879f7045e9215b6f37559/demo/auto_compression/hyperparameter_tutorial.md)。具体命令如下所示：