[coreboot] minor wiki correction

hi all!

ive just read a bit of wiki. as i started to follow the rabbits hole
with libreboot, i've just found gluglug here:
https://www.coreboot.org/Products
the link works, it redirects to minifree, but a small correction would
be good for it, and there can still be a "(formerly gluglug)" note
after a minifree header for those who are already familiar with that
name but didnt follow the change.

ps: im feeling bad about myself, i remember that previously said that
its so hard for newcomers to follow up a lotsa things, but now ive
seen kinda much everything in the wiki that ive missed previously :D

and all the bests for everyone around! :)