Update Weibo.com.xml - #14030

@ShiningRay Thanks for your pull request. Unfortunately this domain can't be simply added because it causes various problems, for example mixed content blocking at https://service.weibo.com/siteshow/siteshow.php and different HTTP/HTTPS content between http://service.weibo.com/z/guyuanrenzheng?fr=leftnlq and https://service.weibo.com/z/guyuanrenzheng?fr=leftnlq .

If you can identify subsections of this domain that can be safely rewritten, we might be able to figure out a way to include those.

Also for future reference, if we could add this domain, it should go directly below the test for security.weibo.com, and you would also need to remove it from Invalid certificate.

@ShiningRay would you like to continue here?

Closing for now due to inactivity, but if interest resumes we can reopen