[FIX] 코드 리뷰 반영

src/main/java/com/soptie/server/routine/service/HappinessRoutineServiceImpl.java

@@ -11,7 +11,7 @@
 @Transactional(readOnly = true)
 @RequiredArgsConstructor
 
-public class HappinessRoutineServiceImpl implements HappinessRoutineService{
+public class HappinessRoutineServiceImpl implements HappinessRoutineService {
 
     private final HappinessThemeRepository happinessThemeRepository;