SPDX Supplier is missing

[BuriKizilkaya]

Hello

I tested parlay with a SPDX2.3 generated from syft. The vendor property would not be added. When I generate for CycloneDx it does. I guess on the enrich_spdx.go file the supplier is missing, I found the following code snippet

enrichSPDXDescription(pkg, pkgData)
enrichSPDXLicense(pkg, pkgData)
enrichSPDXHomepage(pkg, pkgData)