Use the new syntax for prepending the load of twig templates in some Chill*Extension class

src/Bundle/ChillCustomFieldsBundle/DependencyInjection/ChillCustomFieldsExtension.php

@@ -59,7 +59,7 @@ class ChillCustomFieldsExtension extends Extension implements PrependExtensionIn
         // add form layout to twig resources
         $twigConfig = [
             'form_themes' => [
-                'ChillCustomFieldsBundle:Form:fields.html.twig',
+                '@ChillCustomFields/Form/fields.html.twig',
             ],
         ];
         $container->prependExtensionConfig('twig', $twigConfig);