Typo fix

Typo fix

diff --git a/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs b/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
index aa1ffd5..199e93c 100644
--- a/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
+++ b/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
@@ -1,4 +1,4 @@
-<section class='user-preference solo-preference'>
+<section class='user-preferences solo-preference'>
   <form class="form-horizontal">
 
     {{#if showEnforcedNotice}}

GitHub sha: acce7330