Hi hun, don't feel bad! It is totally normal for toddlers to skip meals and they are pretty good at regulating their own intakes so chances are he won't wake hungry. I know it doesn't make a difference to my DD's sleep whether she eats everything I put in front of her and asks for more, or she goes a couple of days just living on air. So hopefully the night will be fine, but if he does wake hungry I would probably give him some milk just so I could get back to bed quicker
Doing it once doesn't mean it'll keep happening so I wouldn't worry unless it starts being a regular thing