No? GitHub is owned by Microsoft

Edit: I'm wrong. Apparently Microsoft owns Activision blizzard?!

Oh no...

I like Codeberg, but I don't think they would allow a project of this size, especially given the liability.

He heard the call and did his duty

Nah that's not how that works. He might have obtained it legally and accidentally. But he made the decision to then distribute it. He can most definitely get sued for that. If you want to distribute basically anything, you need the right permissions / license for that.

He doesn’t hold the copyright so has no right to distribute it. Like if you bought a manuscript from a book you don’t have the right to print copies of it and distribute it. Since you only are the owner of that specific manuscript not the copyright and distribution rights of the actual content.

Just finding something by accident doesn't give you the right to publish it.

If you found someone manuscript in the drawer of a desk you bought, you would not gain the right to publish it, it still belongs to the person that wrote it. Physical possession has nothing to do with the right to distribute, that is IP law that goes back a hundred years.