add anotation 'Transactional' in NicepayService

Author: borntocode2

src/main/java/goodspace/backend/order/service/NicePayService.java

@@ -6,10 +6,12 @@
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
 @Slf4j
 @RequiredArgsConstructor
+@Transactional
 public class NicePayService {
     private final OrderRepository orderRepository;