Rename dangerouslySetInnerHTML to html

RTH sanitizes html now, which means it does not mimic the same behavior as `dangerouslySetInnerHTML`, therefore it should be renamed, as this can possibly cause confusion amongst beginners who are not familiar with `dangerouslySetInnerHTML` and assume it always sanitizes - which it does not.

Suggestion: ``

Start by locating the Truncate component and every reference to dangerouslySetInnerHTML. Check how the current html input is passed and whether examples or documentation use that name. Done means the public prop uses html consistently and the suggested Truncate html="my HTML" usage works without confusion.

Written by the indexing model from the issue text.