fix(用例管理): 修复用例管理评论返回的用户信息中有空数据问题

--bug=1037064 --user=郭雨琦 https://www.tapd.cn/55049933/bugtrace/bugs/view/1155049933001037064

backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseCommentService.java

@@ -266,7 +266,7 @@ public class FunctionalCaseCommentService {
             }
             if (StringUtils.isNotBlank(functionalCaseComment.getNotifier())) {
                 List<String> notifiers = Arrays.asList(functionalCaseComment.getNotifier().split(";"));
-                notifiers.forEach(t-> commentUserInfos.add(userMap.get(functionalCaseComment.getReplyUser())));
+                notifiers.forEach(t-> commentUserInfos.add(userMap.get(t)));
             }
             functionalCaseCommentDTO.setCommentUserInfos(commentUserInfos);
             list.add(functionalCaseCommentDTO);