Merge pull request #147 from Bamdoliro/perf/#146

[개선] 공지사항 조회시 수정일이 나오도록 변경

src/main/java/com/bamdoliro/maru/presentation/notice/dto/response/NoticeSimpleResponse.java

@@ -10,11 +10,11 @@ public class NoticeSimpleResponse {
 
     private final Long id;
     private final String title;
-    private final LocalDateTime createdAt;
+    private final LocalDateTime updatedAt;
 
     public NoticeSimpleResponse(Notice notice) {
         this.id = notice.getId();
         this.title = notice.getTitle();
-        this.createdAt = notice.getCreatedAt();
+        this.updatedAt = notice.getUpdatedAt();
     }
 }