fix: 无法正常修改测试

src/main/java/nju/seec/helper/service/impl/QuizServiceImpl.java

@@ -108,7 +108,7 @@ public class QuizServiceImpl implements QuizService {
     public QuizVO modifyQuiz(LoginUser user, Long quizId, QuizDTO quizDTO) {
         Quiz quiz = quizDAO.findQuizById(quizId);
 
-        if (existsUpdateAuth(user, quiz)) {
+        if (!existsUpdateAuth(user, quiz)) {
             throw HelperException.of(ExceptionType.FORBIDDEN, "您无权修改该测试");
         }