2005 Grand Prix wheel bearing?

I have a 2005 Grand Prix with 75,000 miles.
Just had the front brakes done with new
rotors. The next day I notice a scraping  
noise when applying the brake. It’s almost
like the warning tab sound and it’s repetitive.
Took it back to the shop and they’re saying
it’s the wheel bearing. From what I recall
wheel bearing is a rumbling sound and
increases with speed and turns. Mine only
comes when braking and it’s a scraping
sound. Anyone have experience with a bad
wheel bearing making that noise