Left side Menu, <nav>, cannot take Chinese characters into the URLs.

The URLs have '#' only. For example, if I have a heading named "你好", then the URL should be appended with "#你好" instead of "#", which it actually nothing.
It's a bug. Is that a problem with this theme itself?

You may see what happened through my page: [link](https://liujiewentt.github.io/MyDoc_A/docs/%E4%B8%BB%E9%A2%98%E4%B8%8E%E6%96%87%E4%BB%B6%E5%A4%B9%E8%83%8C%E6%99%AF.html)
