This is an automated false positive from itch.io, triggered simply because this is a brand new account uploading a .dll patch. I have already contacted itch.io support for routine verification, and the warning should disappear in a couple of days once they review it.
Okay, I scanned the zip file as well just to be safe, and there are no viruses in the patch, ( Is safe for download it) I hope they remove that warning as soon as possible, it's annoying.