update bilingual

lib/views/admin/security.html

@@ -86,7 +86,7 @@
             <div class="col-xs-8">
               <textarea class="form-control" type="textarea" name="settingForm[security:registrationWhiteList]" placeholder="例: @crowi.wiki">{{ settingForm['security:registrationWhiteList']|join('&#13')|raw }}</textarea>
               <p class="help-block">{{ t("security_setting.restrict_emails") }}{{ t("security_setting.for_instance") }}<code>@crowi.wiki</code>{{ t("security_setting.only_those") }}<br>
-              1行に1メールアドレス入力してください。</p>
+              {{ t("security_setting.insert_single") }}</p>
             </div>
           </div>