修正CentOS与JDK下载联接问题。

docs/deploy/centos/os/install.md

@@ -2,11 +2,11 @@
 
 ## 下载
 
-官网地址：https://www.centos.org
+官网地址：[https://www.centos.org](https://www.centos.org)
 
-下载页面：https://www.centos.org/download/
+下载页面：[https://www.centos.org/download/](https://www.centos.org/download/)
 
-国内下载地址：http://mirrors.nju.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso
+国内下载地址：[http://mirrors.nju.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso](http://mirrors.nju.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso)
 
 ## 安装
 

docs/deploy/centos/server/jdk.md

@@ -1,10 +1,10 @@
 # JDK
 ## 下载
-官网地址：https://www.oracle.com
+官网地址：[https://www.oracle.com](https://www.oracle.com)
 
-下载页面：https://www.oracle.com/technetwork/java/javase/downloads/index.html
+下载页面：[https://www.oracle.com/technetwork/java/javase/downloads/index.html](https://www.oracle.com/technetwork/java/javase/downloads/index.html)
 
-下载地址：https://download.oracle.com/otn/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.rpm
+下载地址：[https://download.oracle.com/otn/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.rpm](https://download.oracle.com/otn/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.rpm)
 
 使用 wget 下载 JDK