wip: finalize implementation

templates/booking/create/step_1.html.twig

@@ -36,7 +36,7 @@
                                 'attr': {
                                     'hx-post': path('app_booking_create_step_1_refresh'),
                                     'hx-swap': 'none',
-                                    'hx-trigger': 'change'
+                                    'hx-trigger': 'change',
                                 }
                             }) }}
                         {% endfor %}