update README.md

README.md

@@ -65,7 +65,7 @@ For more information read the official [setup guide](//gohugo.io/overview/instal
 
 There is an example site with config file and markdown files in [`exampleSite`](https://github.com/nodejh/hugo-theme-cactus-plus/tree/master/exampleSite) directory.
 
-### The config file
+## The config file
 
 Take a look inside the [`exampleSite`](https://github.com/nodejh/hugo-theme-cactus-plus/tree/master/exampleSite) folder of this theme. You'll find a file called [`config.toml`](https://github.com/nodejh/hugo-theme-cactus-plus/blob/master/exampleSite/config.toml).
 

README_zh-cn.md

@@ -67,7 +67,7 @@ $ git clone https://github.com/nodejh/hugo-theme-cactus-plus.git
 [`exampleSite`](https://github.com/nodejh/hugo-theme-cactus-plus/tree/master/exampleSite) 是本主题的一个示例站点，里面有配置文件、关于页面的一些示例。
 
 
-### 配置文件
+## 配置文件
 
 本主题提供了一个示例配置文件是 [`exampleSite`](https://github.com/nodejh/hugo-theme-cactus-plus/tree/master/exampleSite) 目录里的 [`config.toml`](https://github.com/nodejh/hugo-theme-cactus-plus/blob/master/exampleSite/config.toml) 文件。