Fix link when clicking on the logo

themes/briar/layouts/partials/header.html

     <div id="header_container">
       <div id="header">
-        <a href="index.html"><div id="logo"><img src="/img/briar_logo_large.png" alt="Briar" class="logo"/></div></a>
+        <a href="/"><div id="logo"><img src="/img/briar_logo_large.png" alt="Briar" class="logo"/></div></a>
         <div id="nav">
           <div id="signup">
             <div id="twitter">