uvesafb: Fix URLs in the documentation

Hi,

I just noticed that the uvesafb.txt file needs to be updated
and then I found that Adam Jackson sent a patch for it last October.

patch:
https://marc.info/?l=linux-fbdev&m0765722422257&w=2

patchwork:
https://patchwork.kernel.org/patch/9996857/


What happened here?  anything?

Anyway, for Adam's patch:
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>

-- 
~Randy