fix: 삭제된 괄호 추가

Author: m-a-king

src/main/java/com/somemore/volunteer/service/VolunteerQueryService.java

@@ -81,6 +81,7 @@ public String getNicknameById(UUID id) {
     public VolunteerRankingResponseDto getRankingByHours() {
         List<VolunteerOverviewForRankingByHours> rankingByVolunteerHours = volunteerRepository.findRankingByVolunteerHours();
         return VolunteerRankingResponseDto.from(rankingByVolunteerHours);
+    }
 
     @Override
     public List<Volunteer> getAllByIds(List<UUID> volunteerIds) {