How to handle Zipped Modpacks on java ((Fabric))

So I recently got this mod pack called break neck for 1.21.4 except when I downloaded it, it was in a zipped file instead of just a plain jar file like some other mods I have got and I am not sure how to proceed. can someone help me out on what exactly to do?

and just for clarity I do already have 7zip so I dont need to install any programs if I need to unzip anything