Fix new theme file dir

Author: lruozzi9

templates/shop/shared/layout/base/header/content/desktop-search.html.twig

@@ -1,6 +1,6 @@
 {% set searchForm = get_search_form() %}
 
-{% form_theme searchForm '@SyliusShop/Form/theme.html.twig' %}
+{% form_theme searchForm '@SyliusShop/form/theme.html.twig' %}
 
 <div class="col d-none d-lg-block">