That's a fairly sweeping generalisation - all dogs will bite - there's not one particular breed that specifically bites children. I would have thought that more people are bitten by collies than are bitten by staffies. A survey of dog bites in Britain showed that Golden Retrievers were actually the most common attackers.
www.saferpets.co.uk/safedogbreedsforchildren.html says...
"there are certain breeds with child-friendly reputations, so here are a few firm family favourites:
Shih-Tzu - full of infectious, extrovert enthusiasm, these intelligent little dogs are fun companions although they can be independent and wilful too!
Pug - friendly, affectionate character which may suffer in humidity and heat, due to their short faces. Despite their small size, they are not snappy or nervous like many toy breeds and are low maintenance (minimal grooming and exercise)
Cavalier King Charles Spaniel - energetic playmate with loving nature who will adapt to any lifestyle but needs regular exercise and grooming of its long, silky coat. Heart disease is a problem in this breed.
Border Terrier - a compact, robust, short-coated dog that's great for families with active children. Good watchdogs although terrier-characteristics have to be kept in check, such as digging!
Beagle - happy, sociable, ideal family dogs although not the easiest to train as, being a scent hound, they become obsessed once they pick up a scent trail and will ignore all commands.
<strong>Staffordshire Bull Terrier - a powerful, muscular dog which is nevertheless tolerant and affectionate with children and devoted to its family. Highly intelligent and fearless, it can be slightly combative with other dogs if not well-socialised from young.</strong>
Cocker Spaniel - sensitive, affectionate and intelligent little dog which requires some grooming and a fair amount of exercise. They have keen hunting instincts and can be strong-willed.
Labrador/Golden Retriever - good-natured and eager to please, the Lab's love of water can be a nuisance as it will find any puddle available; they both also enjoy retrieving and carrying things around. Labs are energetic and require a lot of exercise but also adore food. The Golden has a longer coat which needs more grooming."
But when push comes to shove, your child, do what you feel best