[release-2.0] Fixed the problem that comment reply cannot be displaye…

…d in the front end (#2965)

This is an automated cherry-pick of #2954

/assign JohnNiang

```release-note
修复开启评论审核的情况下无法显示评论回复的问题
```

src/main/java/run/halo/app/content/comment/ReplyServiceImpl.java

@@ -62,7 +62,8 @@ public Mono<Reply> create(String commentName, Reply reply) {
                         }
                         reply.getSpec().setApproved(
                             Boolean.FALSE.equals(commentSetting.getRequireReviewForNew()));
-                        reply.getSpec().setHidden(!reply.getSpec().getApproved());
+                        // fix https://github.com/halo-dev/halo/issues/2951
+                        reply.getSpec().setHidden(false);
 
                         if (BooleanUtils.isTrue(reply.getSpec().getApproved())
                             && reply.getSpec().getApprovedTime() == null) {