Just bring it up to your pediatrician at his next visit. Babies normally have legs that curve inward for the first couple months of life because of how the grew and developed in the fetal position in the womb. But if your concerned it never hurts to ask ;)
My Son HaD That For The First Few Months Of Walking, It Straightened Out.
But for sure bring it up to his doctor
My sons are like that his doctor said it's common and should straighten out as he grows... It's a twisted tibia I think that's what he said it's not club foot my dad has club foot