feat: links to section within the same page should not reload page

[ayo-run]

In the cozify() function within utils/sanitizer.ts, if the href value of an a element is within same article, it is most likely just to an article section

Set the value of href so that it only has the section url prepended by #

[Avadhut20]

Hi @ayoayco.
I want to work on this issue. Could you please assign it to me?

[ayo-run]

PR welcome! No need to assign