fix: properly assign readonly state to form fields for unavailable services

src/Form/Service/ParticipantParkingFieldHandler.php

@@ -118,7 +118,7 @@ class ParticipantParkingFieldHandler extends AbstractParticipantFieldHandler
      */
     private function findParkingService(BookingDto $bookingDto): ?Service
     {
-        $parkingServices = $bookingDto->travel->getAdditionalServicesBySubTypes(Constants::TOKEN_PARKING, true);
+        $parkingServices = $bookingDto->travel->getAdditionalServicesBySubTypes(Constants::TOKEN_PARKING);
 
         if (empty($parkingServices)) {
             return null;