Right now, the 'title' HTML tag value is generated based on sidebar item value

Sometimes I want to make it more custom, e.g. to make it more convenient for SEO, but keep it short in sidebar

Would be great to have this ability

We can do it in the same way as ignoring subheaders works
https://docsify.js.org/#/more-pages?id=ignoring-subheaders

e.g.

# Getting Started {docsify-title=Getting started with iOS machine learning SDK toolkit}