Update README.md

Author: hyln

README.md

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 # emNavi 文档构建说明
 
 [![pages-build-deployment](https://github.com/emNavi/document/actions/workflows/pages/pages-build-deployment/badge.svg?branch=master&event=page_build)](https://github.com/emNavi/document/actions/workflows/pages/pages-build-deployment)
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 emNavi 文档地址：[https://emnavi.tech](https://emnavi.tech)
 
 ## 1、下载项目