Fix dividers that separate publications by year

Author: harishravichandar

papers/index.html

@@ -79,6 +79,10 @@ <h1>Preprints</h1>
   <div class="row">
     <div class="col-md-12">
       <h1>{{ year }}</h1>
+    </div>
+  </div>
+  <div class="row">
+    <div class="col-md-12">
       <hr style="height:2px;border:none;color:#808088;background-color:#808088;" />
     </div>
   </div>