ref |> 热门评论最后一条与分割线间距过小，见截图

http://192.168.1.3:8080/zentao/bug-view-20467.html

Signed-off-by: xugenyuan <xugenyuan@wondertek.com.cn>

@@ -131,6 +131,7 @@ export struct CommentComponent {
 
     Column() {
       if (showGapLine) {
+        Blank().height(12)
         Divider().strokeWidth(6).color('#f5f5f5')
       }