Broken Link makes it hard to find single-header version

[granthusbands]

If you follow the releases link in the readme at https://github.com/libnonius/nonius/ it leads to https://github.com/rmartinho/nonius/releases . All of the releases there are present as full source only with no single-header versions. The correct link that has releases with single-header versions is https://github.com/libnonius/nonius/releases

I think this is causing some confusion among potential users, as evidenced by other bug reports.