feat(header.php): changes so that boards & pins will be able to access it.

misc/header.php

@@ -5,4 +5,4 @@
     <meta charset="UTF-8"/>
     <meta name="description" content="A privacy respecting Pinterest image search"/>
     <meta name="referrer" content="no-referrer"/>
-    <link rel="stylesheet" type="text/css" href="misc/style-dark.css">
+    <link rel="stylesheet" type="text/css" href="/misc/style-dark.css">