well, that is odd, the MSI website isn't showing me any drivers or BIOS so I can't really say.
https://www.msi.com/Motherboard/support/z170a-krait-gaming#down-bios
if you can see page and bios, most of time MSI show a link to a YouTube video about how to update bios. Should be at top left of BIOS page.
Its an intel CPU, you should be fine updating. I only mention CPU as some AMD motherboard are restrictive as to what CPU can be updated to what bios.
Don't update if you likely to lose power half way through or during a storm.
You should be fine, there are just horror stories about everything these days
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