fix: typo in pet.json
fix: typo in pet.json

Co-authored-by: Martin Norgaard <358e5ab28494078ecb588383cd1639c0a3f9e945@nru.dk>
Squishymedia/BIDS-Validator,nellh/bids-validator,nellh/bids-validator,Squishymedia/bids-validator,nellh/bids-validator