图片上有红色波浪线

[config-center.html](http://dubbo.apache.org/zh-cn/docs/user/configuration/config-center.html)
不止这一个页面，好多图都有

Open the linked config-center.html page and inspect the displayed images and their shared styling, then compare the other affected documentation pages. Determine where the red wavy lines originate; the work is done when the affected images display without them across the reported pages.

Written by the indexing model from the issue text.