I know this post was off topic but I thought maybe someone would advise me about whether or not this would be safe for me to do.
Custom built PC or one from an OEM such as Dell/HP/Asus/Acer etc? BIOS updates don't provide much benefit, especially if the system is an older one (such as mine). They don't fix much, aside from maybe a bug or two, with a specific piece of hardware. Even as a security guy, it's highly unlikely that anyone is putting BIOS rootkits on your PC as an end user.
On the other hand, if you're running bleeding edge technology, you may see a significant increase in compatible hardware, and performance as kinks are worked out.
Personally: I wouldn't bother it. A lot can go wrong, and not much benefit in it (to my knowledge at least)