chore(community): Service 수정

Author: ayoung-dev

src/main/java/com/somemore/community/service/command/CreateCommunityBoardService.java

@@ -20,7 +20,7 @@ public class CreateCommunityBoardService implements CreateCommunityBoardUseCase
     @Override
     public Long createCommunityBoard(CommunityBoardCreateRequestDto requestDto, UUID writerId, String imgUrl) {
 
-        CommunityBoard communityBoard = requestDto.toEntity(writerId, imgUrl != null ? imgUrl : "");
+        CommunityBoard communityBoard = requestDto.toEntity(writerId, imgUrl == null ? "" : imgUrl);
 
         communityBoardRepository.save(communityBoard);