Rainbow Runtz Auto / Indoor soil organic

This looks like the leaves couldn't get enough water, so they got a partial necrosis.. it happens often if the pH is too high in the beginning, and then there's no water going into the plant or not enough.. This will just stop after a while, when the juices start running! It can also be due to the plant getting used to a stronger light. I would keep an eye on the new growth, if that looks good, you're fine!