update bilingual

lib/views/admin/customize.html

@@ -47,7 +47,7 @@
 
       <form action="/_api/admin/customize/behavior" method="post" class="form-horizontal" id="cutombehaviorSettingForm" role="form">
       <fieldset>
-        <legend>挙動</legend>
+        <legend>{{ t('customize_page.Behavior') }}</legend>
 
         <div class="form-group">
           <div class="col-xs-6">