Quick question about kext folders

Hey. I'm trying to build my first Hackintosh using the Dortania guide but I ran into one issue. My ethernet card is I225-V, so I did some research and ran into this guide https://github.com/5T33Z0/Gigabyte-Z490-Vision-G-Hackintosh-OpenCore/blob/main/I225-V_FIX.md#option-1-using-a-ssdt-with-corrected-header-description

When I try to download AppleIGC directly from github for option 1, the folder is not in .kext extennsion. When I unzip the file, this is what I see: https://prnt.sc/1Gxsrh1udC9N

Any help or clarification would be appreciated

Author: @Aftervitae