This reflects a change of forges; after GitHub project was archived the
"main" source repository was moved to PsyInf's forgejo and a Codeberg
mirror was set up to provide an issue tracker which is (more) publically
accessible for creating issues.
I would consider whether the Documentation link pointing to the same URL
as the source is needed, but since that was the case previously, I opted
to be less invasive and update the URL rather than remove it.
