Fixed the problem that comment reply cannot be displayed in the front end (#2954)

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#### What type of PR is this?
/kind bug

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#### What this PR does / why we need it:
/kind api-change

#### Which issue(s) this PR fixes:

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Fixes #2951 

#### Special notes for your reviewer:

#### Does this PR introduce a user-facing change?

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```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 class ReplyServiceImpl implements ReplyService {
                         }
                         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) {