Hey mate,
no worries. The plant is young and her leaves are thin. They deform fast, happens to seedlings all the time. Too much water for the seedling, the leaves take in a lot of it and swell weirdly, and since they thin and weak they deform a bit wavy.
But it doesnt matter in any way, like i said it happens all the time. The first 2 weeks the plants needs change every few days, because by percentage she is growing a lot and that also changes the light, water and nutrient she needs just that much.
As long as the plant looks rather healthy i wouldnt stress it and yours looking fine.