Merge pull request #181 from haolongzhangm/update-readme

Update README.md

README.md

@@ -19,6 +19,7 @@ MegEngine is a fast, scalable and easy-to-use deep learning framework, with auto
 To install the pre-built binaries via pip wheels:
 
 ```bash
+python3 -m pip install --upgrade pip
 python3 -m pip install megengine -f https://megengine.org.cn/whl/mge.html
 ```
 

README_CN.md

@@ -20,6 +20,7 @@ MegEngine 是一个快速、可拓展、易于使用且支持自动求导的深
 通过 pip 安装的命令如下：
 
 ```bash
+python3 -m pip install --upgrade pip
 python3 -m pip install megengine -f https://megengine.org.cn/whl/mge.html
 ```