You're not the only one! It happened to one of my friends too. I don't know why that happens, we just compiled it from Godot, zipped it, and uploaded it to itch.io. Just to be sure, I uploaded it to virustotal to see for myself. Windows Defender is the only antivirus that flags this as a trojan, all the other antiviruses say it's safe. Maybe it's just because the executable is not signed??? I don't know, anyways, here's the virustotal scan.
https://www.virustotal.com/gui/file/c85b2d75b3096e81f5bad8ac05dfc163f816fb2e7f15...