Fix offline installation link in mkdocs.yml

Author: maninhill

mkdocs.yml

@@ -45,11 +45,11 @@ nav:
     - 系统架构: system_arch.md
     - 源码运行: source_run.md
     - 安装部署:
+        - 离线安装（生产环境推荐）: installation/offline_installtion.md        
         - 1Panel 安装: installation/1panel_installtion.md
         - 在线安装: installation/online_installtion.md
         - Windows 安装: installation/win.md
         - 阿里云安装: installation/aliyun.md
-        - 离线安装: installation/offline_installtion.md        
         - 命令行工具: installation/cli.md
         - 常见问题: installation/faq.md
     - 功能手册: