… with a programmer. The bios update you provided isn’t a complete firmware and it has an unusual structure for a bios region, too.
This guide is for AMI bioses, but sometimes it can be done with UEFITool for other Vendors, too.
In case you dont want to do it yourself, put in into Bios modding requests. Anyway you need a complete dump first! (For the dump you could try Intel Flash Programming Tool first, maybe the machine has a service jumper that’d allow for repogramming, too.)