인증 유효 시간 변경

9시간 -> 3시간

src/main/java/com/example/daemawiki/domain/mail/repository/AuthMailRepository.java

@@ -23,7 +23,7 @@ public Mono<Void> save(AuthMail authMail) {
         return redisOperations.opsForValue()
                 .set(AUTHMAIL + authMail.getMail(),
                         authMail.getMail(),
-                        Duration.ofHours(9))
+                        Duration.ofHours(3))
                 .then();
     }