1- don't bump
2- if there are any BIOS updates, they would be on Lenovo's site
3- first-party OEMs rarely add support for new CPUs in their BIOS except in the rare event where the manufacturer decides to extend the model line to new CPUs using the same motherboard
4- OEMs rarely support overclocking in their BIOS which makes 2500k/3570k pointless
So you are probably better off forgetting about it and replace the motherboard along with the CPU.
Thanks for the reply and sorry I thought bumping was allowed on this site.