update layout install cmd
install layoutparser
```sh
-wget https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
-pip3 install layoutparser-0.0.0-py3-none-any.whl
+pip3 install https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
```
## 1. Introduction to pipeline
