Fix path to favicon (vuejs#106)

logo.png 404's at the moment

Author: Hyra

src/index.template.html

@@ -5,7 +5,7 @@
  <title>Vue HN 2.0</title>
  <meta name="mobile-web-app-capable" content="yes">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
- <link rel="shortcut icon" sizes="48x48" href="/logo.png">
+ <link rel="shortcut icon" sizes="48x48" href="/public/logo-48.png">
  <meta name="theme-color" content="#f60">
  <link rel="manifest" href="/manifest.json">
  </head>