Hey Jamzy, looks like a bit of stress, but not too much stress , this you can see because the stems are not red, when the stems are red, that means too much stress. the brown spots look like they are actually from the watering, like the light hit some water on the plant and made some marks where the water droplets were. Just dial in the watering and this seedling will thrive, no problem. Hope this helps ! 🚀