Fix broken links in README.md

[kkebo]

It seems that fixing relative links was forgotten when the README.md was moved in #270.

[davdroman]

Good shout, though I think we need to use absolute links here since the origin page can vary (/ or /README.md). Mind making the change?

[kkebo]

@davdroman Thank you for your suggestion, but GitHub recommends using relative links instead of absolute links.

https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes#relative-links-and-image-paths-in-readme-files

Relative links are easier for users who clone your repository. Absolute links may not work in clones of your repository - we recommend using relative links to refer to other files within your repository.

[davdroman]

Fair. Just tested and it works from both locations which I didn’t know. So merging. Thanks for your contribution!