Update "Forked from" reference in GitHub

[septatrix]

One can open a request with the GitHub support to change the "Forked from" relation to remove it or change it to a different repository. While to old documentation like over at stackoverflow (https://stackoverflow.com/a/72221212/7583539) now redirects somewhere else a user commented on that answer saying that such a request still worked at the end of 2024. As this is a quick and easy request which might prevent some confusion I would appreciate if one of the maintainers would do this.