That's why I said create a Restore Point. That way if you do somthing that bollocks it up you can restore to the last working version.
BIOS updates aren't that frequent, but there will be new Meltdown and Spectre updates out sometime soon.
The best place to check for BIOS updates is at the Toshiba support site. But IoBit is good for actually going to the manufacturers website; sometimes, for example, Realtek will update the sound driver and it will take Toshiba (or whoever) ages to port that over to their driver database.