[mkdocs] - duplicate anchor links used on page

When nested property names are the same as property names at the top level of a trace, they use the same anchor, but should use different ones.

E.g. in our current docs

https://plotly.com/javascript/reference/scatter/#scatter-error_x-visible
https://plotly.com/javascript/reference/scatter/#scatter-visible

For mkdocs site,

/javascript/reference/scatter/#scatter-error_x-visible won't work

and

/javascript/reference/scatter/#scatter-visible

will take you to the first one on the page, which is actually the error-x-visible property

使用 issue 中显示的两个 URL，复现 MkDocs 渲染的 scatter 参考中的重复锚点，然后追踪嵌套属性和顶层属性的锚点是如何生成的。完成的标准是两个链接都能解析到各自对应的属性，且其中一个不会取代另一个。