Update README.md

README.md

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 [![Total Lines](https://tokei.rs/b1/github/analysys/EasyScheduler?category=lines)](https://github.com/analysys/EasyScheduler)
 
 > Easy Scheduler for Big Data
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 [![EN doc](https://img.shields.io/badge/document-English-blue.svg)](README.md)
 [![CN doc](https://img.shields.io/badge/文档-中文版-blue.svg)](README_zh_CN.md)