does it tell you what trojan? if it's Trojan.Heur!.02252123, it's apparently a false positive that seems to be triggered by something in godot as that seems to happen to other godot games too, and i don't think there's much i can do to fix that unfortunately
here's the virustotal report on the windows 64-bit build showing that's the only thing that's being reported, as well as a an issue on godot's github where the devs of godot itself seem to say there's nothing one can do about it without paying microsoft for code signing