fix quote issue

Resources/views/CRUD/base_filter_field.html.twig

@@ -19,7 +19,7 @@ file that was distributed with this source code.
         <br />
     {% endblock %}
 
-    <div class="sonata-ba-field{% if filter_form.vars.errors %} sonata-ba-field-error"{% endif %}">
+    <div class="sonata-ba-field{% if filter_form.vars.errors %} sonata-ba-field-error{% endif %}">
         {% block field %}{{ form_widget(filter_form) }}{% endblock %}
     </div>
 </div>