Update default.html

Author: sangam14

_layouts/default.html

@@ -67,6 +67,9 @@ <h3> Did you find Dockerlabs useful? Vote for us. </h3>
       <right> <a href="https://github.com/collabnix/dockerlabs/edit/master/{{ page.path }}" class="btn">Improve This Page </a>
       {% endif %}
        <span class="site-footer-credits">This page was generated by <a href="https://pages.github.com">GitHub Pages</a>.
+         <!-- Start of HubSpot Embed Code -->
+  <script type="text/javascript" id="hs-script-loader" async defer src="//js.hs-scripts.com/7198565.js"></script>
+<!-- End of HubSpot Embed Code -->
         </span> 
       </footer>
     </main>