Update install.md

Author: huangjun12

docs/en/install.md

@@ -4,15 +4,17 @@
 
 ---
 
-## Introducation
+- [Introduction](#Introduction)
+
+## Introduction
 
 This document introduces how to install PaddleVideo and its requirements.
 
 ## Install PaddlePaddle
 
 Python 3.7, CUDA 10.1, CUDNN7.6.4 nccl2.1.2 and later version are required at first, For now, PaddleVideo only support training on the GPU device. Please follow the instructions in the [Installation](http://www.paddlepaddle.org.cn/install/quick) if the PaddlePaddle on the device is lower than v2.0
 
-Install PaddlePaddle
+**Install PaddlePaddle**
 
 ```bash
 pip3 install paddlepaddle-gpu --upgrade
@@ -38,6 +40,7 @@ Note:
 - Indicate **WITH_DISTRIBUTE=ON** when compiling, Please refer to [Instruction](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/install/Tables.html#id3) for more details.
 - When running in the docker, in order to ensure that the container has enough shared memory for data read acceleration of Paddle, please set the parameter `--shm_size=32g` at creating a docker container, if conditions permit, you can set it to a larger value.
 
+---
 
 ## Install PaddleVideo