Update README.md

README.md

@@ -187,9 +187,11 @@ nginx | 1.10 | http://nginx.org/en/download.html
 - [MyBatis从入门到精通](https://book.douban.com/subject/27074809/)
 - [深入浅出MySQL](https://book.douban.com/subject/25817684/)
 - [循序渐进Linux（第2版）](https://book.douban.com/subject/26758194/)
+- [Elasticsearch 权威指南](https://www.elastic.co/guide/cn/elasticsearch/guide/current/index.html)
 - [Elasticsearch 技术解析与实战](https://book.douban.com/subject/26967826/)
 - [MongoDB实战(第二版)](https://book.douban.com/subject/27061123/)
 - [Kubernetes权威指南](https://book.douban.com/subject/26902153/)
+- [Pro Git](https://git-scm.com/book/zh/v2)
 
 ## 许可证