Fix one more spelling mistake (in the HTML code this time)

 - Legacy-Id: 3396

Author: OleLaursen

ietf/templates/wgchairs/edit_management_shepherd.html

@@ -33,7 +33,7 @@ <h1>Change shepherd for {{ doc }}</h1>
 
   <tr><td>{{ form.as_p }}</td></tr>
   </table>
-    <input type="submit" name="change_sheperd" value="Change shepherd" />
+    <input type="submit" name="change_shepherd" value="Change shepherd" />
     {% if form.can_cancel %}<a href="">No! I don't want to continue</a>{% endif %}
 </form>
 </td></tr></table>