Restored guide link

Should we call it styleguide though?

website/themes/uppy/layout/index.ejs

@@ -1,7 +1,7 @@
 <div id="hero">
   <div class="inner">
     <ul id="nav">
-      <!-- <li><a href="/guide/" class="nav-link">Guide</a></li> -->
+      <li><a href="/guide/" class="nav-link">Guide</a></li>
       <li><a href="/api/" class="nav-link">API</a></li>
       <li><a href="/examples/" class="nav-link">Examples</a></li>
       <!-- <li><a href="/blog" class="nav-link">Blog</a></li> -->