chore: Java 스타일 수정

Author: github-actions

backend/src/main/java/io/f1/backend/domain/quiz/app/QuizService.java

@@ -189,12 +189,11 @@ public QuizListPageResponse getQuizzes(String title, String creator, Pageable pa
 
         return toQuizListPageResponse(quizListResponses);
     }
-  
+
     @Transactional(readOnly = true)
     public Quiz getQuizById(Long quizId) {
         return quizRepository
                 .findById(quizId)
                 .orElseThrow(() -> new RuntimeException("E404002: 존재하지 않는 퀴즈입니다."));
-
     }
 }