[fix] #61 채팅 읽음 버그 수정

src/main/java/org/gachon/checkmate/domain/chat/mongorepository/ChatCustomRepositoryImpl.java

@@ -43,7 +43,7 @@ public void updateChatRead(final String chatRoomId, final Long userId) {
         Update update = new Update();
 
         query.addCriteria(Criteria.where("chatRoomId").is(chatRoomId)
-                .and("sender").ne(userId));
+                .and("senderId").ne(userId));
 
         update.set("isRead", true);
         mongoTemplate.updateMulti(query, update, Chat.class);