minor: editing yard template

Author: Brandon Black

tasks/yard/templates/default/tags/html/core.erb

@@ -1,5 +1,5 @@
 <% if object.has_tag?(:core) %>
-  <h3>Core docs:</h3>
+  <p class="tag_title"><strong>Core Docs:</strong></p>
   <ul class="see">
     <% for tag in object.tags(:core) %>
       <li><a href='<%= "http://dochub.mongodb.org/core/#{tag.name}" %>' name='<%= tag.text %>'><%= tag.name.capitalize %></a></li>