Bug 646256 – correct filetype for the apple-touch-icon of the desktop site

templates/desktop/base.html

@@ -6,7 +6,7 @@
 		{# L10n: Page title pattern for <title> tag. #}
 		<title>{{ _('{title} | Spark powered by Firefox for mobile')|f(title=title) }}</title>
 		<link rel="shortcut icon" type="image/x-icon" href="{{ MEDIA_URL}}img/favicon.png">
-		<link rel="apple-touch-icon" href="{{ MEDIA_URL}}img/apple-touch-icon.gif">
+		<link rel="apple-touch-icon" href="{{ MEDIA_URL}}img/apple-touch-icon.png">
 		{% block site_css %}
 	      {{ css('desktop') }}
 	    {% endblock %}