There’s been a hostile takeover at Gitea and it’s now run / owned by a for-profit company. The developers forked the project under the name Forgejo and are continuing the work under a non-profit. See also: Their introduction post and a page comparing the two projects. Feel free to look up more, since I haven’t familiarized myself with the incident all that much myself. Either way though, maybe consider using Forgejo instead of Gitea.
A lot of contributors of FOSS projects make small changes that aren’t copyrightable.