[#14] bug : reservationId 변수명 수정

Author: mmihye

skyscanner/src/main/java/org/third/thirdseminar/controller/dto/response/AirDto.java

@@ -3,7 +3,7 @@
 import org.third.thirdseminar.domain.Reservation;
 
 public record AirDto (
-        Long airId,
+        Long reservationId,
         String airName,
         TimeRangeDto startTime,
         TimeRangeDto endTime,