Added link to extras

netbox/templates/docs.html

@@ -18,6 +18,7 @@
                     <a href="{% url 'docs' path='ipam' %}" class="list-group-item{% if path == 'ipam' %} active{% endif %}">IPAM</a>
                     <a href="{% url 'docs' path='circuits' %}" class="list-group-item{% if path == 'circuits' %} active{% endif %}">Circuits</a>
                     <a href="{% url 'docs' path='secrets' %}" class="list-group-item{% if path == 'secrets' %} active{% endif %}">Secrets</a>
+                    <a href="{% url 'docs' path='extras' %}" class="list-group-item{% if path == 'extras' %} active{% endif %}">Extras</a>
                 </div>
             </div>
         </div>