As said, it is highly unlikely for a virus to find a way in a darktable installer from a reliable source, and the generic name of the “threat” often comes in combination with “exotic” files. Just in case, one can upload the reported file to VirusTotal, where it is inspected with 40+ antivirus engines.
Even a small number of positives still means everything is OK, false positives are common with files from open-source software, even more from development versions and such.
On my Windows laptop, I see different versions of libgio-2.0-0.dll in darktable, RawTherapee, Partha’s Gimp, PhotoFlow, Inkscape, and some other directories.
Here is a fresh report from VirusTotal.