update favicon.ico

Author: booxood

favicon.ico

@@ -8,6 +8,7 @@
     <meta name="description" content="A modern comment component based on Github Issue and Preact.凹凸实验室出品的一款基于 Github Issue 和 Preact 开发的评论插件">
     <title>Gitalk Demo | Aotu.io「凹凸实验室」</title>
     <link rel="shortcut icon" type="image/x-icon" href="/favicon.ico"/>
+    <link rel="icon" href="/favicon.ico" type="image/x-icon">
     <style type="text/css">
       * {
         margin: 0;