change page title

spa/404.html

@@ -10,7 +10,7 @@
         <meta name="msapplication-TileColor" content="#FFFFFF">
         <meta name="msapplication-TileImage" content="images/favicon/mstile-144x144.png">
         <link rel="icon" href="images/favicon/favicon-32x32.png" sizes="32x32">
-        <title>Materialize</title>
+        <title>未找到</title>
         <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
         <!-- Materialize core CSS -->
         <link href="materialize/css/materialize.css" rel="stylesheet">