Fix spelling mistake in template

 - Legacy-Id: 3405

Author: OleLaursen

ietf/templates/wgchairs/confirm_management_writeup.html

@@ -9,7 +9,7 @@
 <a href="{% url manage_shepherds wg.group_acronym.acronym %}">Return to shepherd list</a>
 </p>
 
-<h1>Updatting write-up for {{ doc }}</h1>
+<h1>Updating write-up for {{ doc }}</h1>
 
 <p>
 Before you modify the protocol write-up <strong>please revise the 'Doc Shepherd Follow-up Underway' annotation tag and set or reset it if appropriate</strong>.