Fixed doc (#578)

优雅的使用 icon 此文档地址更新

src/views/documentation/index.vue

@@ -19,7 +19,7 @@ export default {
         { title: '实战篇', href: 'https://segmentfault.com/a/1190000009762198' },
         { title: 'vueAdmin-template 篇', href: 'https://segmentfault.com/a/1190000010043013' },
         { title: '自行封装 component', href: 'https://segmentfault.com/a/1190000009090836' },
-        { title: '优雅的使用 icon', href: 'https://segmentfault.com/a/https://segmentfault.com/a/1190000012213278' }
+        { title: '优雅的使用 icon', href: 'https://segmentfault.com/a/1190000012213278' }
       ]
     }
   }