fix: grammar error in about page

source/about/index.md

@@ -16,7 +16,7 @@ A nice place to show yourself. You can add your own information in your site's `
 ![](http://ppoffice.github.io/hexo-theme-icarus/gallery/profile.png "")
 
 ### Self-hosted Insite Search Engine
-With the help of [Insight Search](https://github.com/ppoffice/hexo-theme-icarus/wiki/Search#insight-search), you can search anything inside your site without add any third-party plugin.
+With the help of [Insight Search](https://github.com/ppoffice/hexo-theme-icarus/wiki/Search#insight-search), you can search anything inside your site without any third-party plugin.
 
 ![](https://ooo.0o0.ooo/2016/04/07/57068467ad5ea.png)
 

themes/icarus

@@ -1 +1 @@
-Subproject commit d1776a09295b043a603e4dfb4588adbc05971d31
+Subproject commit 2e88862450c6de76a550ccefaa6d1b022f38454f