How to use absolute links in README file that don't break on fork / merge?

[diarmidmackenzie]

From #17

One other point worth commenting on:

note: links aren't relative, so clicking https://diarmidmackenzie.github.io/aframe-physics-system and then clicking through to examples leads to the c-frame master examples instead of your local ones. may want to update those while you're here.

I don't know how to solve this. There's a good reason the links aren't relative - they wouldn't work in both the README view in GitHub and also on GitHub pages.

But if they are absolute, they need to updated every time you fork / merge. Which would quite likely lead to broken links in master (whic IMO is worse than broken links in a preview of a PR).

The problem seems to be documented here:
https://stackoverflow.com/questions/40196198/automatic-link-to-github-pages-url-from-readme-md

It's possible that this GitHub Action could provide a solution. There don't seem to be any other solutions available.
https://github.com/marketplace/actions/dynamic-readme

Originally posted by @diarmidmackenzie in #17 (comment)

[diarmidmackenzie]

This GitHub Action isn't a great solution:

"There is a GitHub Action here that fills this need, but it has to be run any time there is a change, and also needs to make a new commit: https://github.com/marketplace/actions/dynamic-readme"

(from this GH Feature Request on the topic : https://github.com/orgs/community/discussions/37122)