Link past events write up to repo

Closes #518

Author: riyadhalnur

index.html

@@ -81,7 +81,7 @@ <h2 class="big-heading" data-i18n="index-workshop-header">Workshops</h2>
           <ul class="inner-nav">
             <li><a href="host.html" data-i18n="index-workshop-links-host">Host Your Own</a></li>
             <li><a href="events.html" data-i18n="index-workshop-links-events">See All Events</a></li>
-            <li><a href="host.html#writeups" data-i18n="index-workshop-links-writeups">Writeups of Past Events</a></li>
+            <li><a href="https://github.com/nodeschool/write-ups" data-i18n="index-workshop-links-writeups">Writeups of Past Events</a></li>
           </ul>
         </nav>
       </div>