[Twig][Bridge] replaced extends with use in bootstrap_3_horizontal_layout.html.twig

src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_horizontal_layout.html.twig

@@ -1,4 +1,4 @@
-{% extends "bootstrap_3_layout.html.twig" %}
+{% use "bootstrap_3_layout.html.twig" %}
 
 {% block form_start -%}
     {% set attr = attr|merge({class: (attr.class|default('') ~ ' form-horizontal')|trim}) %}