update bilingual

lib/views/admin/customize.html

@@ -93,7 +93,7 @@
 
       <form action="/_api/admin/customize/layout" method="post" class="form-horizontal" id="cutomlayoutSettingForm" role="form">
       <fieldset>
-        <legend>レイアウト</legend>
+        <legend>{{ t('customize_page.Layout') }}</legend>
 
         <div class="form-group">
           <div class="col-xs-6">