Update suggestions (#812)

* Update suggestions

Here I think using "code warehouse" instead of "code warehouse" can eliminate unnecessary ambiguity.

* Update suggestions.md

---------

Co-authored-by: Yudong Jin <krahets@163.com>

docs/chapter_preface/suggestions.md

@@ -189,7 +189,7 @@
 
 **第一步：安装本地编程环境**。请参照[附录教程](https://www.hello-algo.com/chapter_appendix/installation/)进行安装，如果已安装则可跳过此步骤。
 
-**第二步：下载代码仓**。如果已经安装 [Git](https://git-scm.com/downloads) ，可以通过以下命令克隆本仓库。
+**第二步：克隆或下载代码仓**。如果已经安装 [Git](https://git-scm.com/downloads) ，可以通过以下命令克隆本仓库。
 
 ```shell
 git clone https://github.com/krahets/hello-algo.git