Update content integration guide link in welcome_new_user_email template

Author: rtibbles

contentcuration/contentcuration/templates/registration/welcome_new_user_email.html

@@ -120,7 +120,7 @@
         </a>
       </li>
       <li>
-        <a href="https://drive.google.com/file/d/1uvbTnIyxIP6lrFKPIat8pIJeIa5RNZf5/view?usp=sharing">
+        <a href="http://le.fyi/content-integration-guide">
           <b>{% translate "Content integration guide:" %}</b>
         </a>
         {% blocktranslate %}