fix: 여행 리포트 API 응답 필드 매핑 오류 수정(#90)

* refactor: TripReport.of()에서 매개변수 순서 조정

Author: chaiminwoo0223

src/main/java/com/ject/studytrip/trip/domain/model/TripReport.java

@@ -47,10 +47,10 @@ public class TripReport extends BaseTimeEntity {
 
     public static TripReport of(
             Member member,
-            String startDate,
-            String endDate,
             String title,
             String content,
+            String startDate,
+            String endDate,
             long completedMissionCount,
             long totalFocusHours,
             long studyDays,