Update UserResponse.java

Author: LJW22222

src/main/java/backend/airo/api/user/dto/UserResponse.java

@@ -26,6 +26,7 @@ public static UserResponse create(User user) {
                 .id(user.getId())
                 .email(user.getEmail())
                 .name(user.getName())
+                .nickname(user.getNickname())
                 .phoneNumber(user.getPhoneNumber())
                 .birthDate(user.getBirthDate())
                 .providerType(user.getProviderType())