Fix HTML validation issues

index.html

@@ -1,12 +1,13 @@
 <!doctype html>
-<html>
+<html lang="en">
 <head>
-    <title></title>
+    <meta charset="utf-8">
+    <title>Top GitHub Issues</title>
     <link href='https://www.mapbox.com/base/latest/base.css' rel='stylesheet' />
 </head>
 <body class="prose" style="margin: 50px;">
 
-<h1 id="title">Top Github Issues</h1>
+<h1 id="title">Top GitHub Issues</h1>
 
 <div id="error" class="note error" style="display: none;"></div>
 <div id="loading" class="loading"></div>