Until plants get a little further along, damaged or gimpy leaves are fairly common. After the 4th set of leaves shows, the plant will be fairly stable and will be fine. FWIW, you never see nutrient defiencies at this early stage unless you are using a water based system that has NO nutrients in it. I bring this up because a lot of new growers panic anytime they see ANY leaf damage or bruises. The first reaction is to dump nutrients and
cal-mag on it. Your plants look fine and have no problems that I can see.