In general, your plant looks very healthy at first. If there is too much nitrogen, your leaves and especially your leaf tips will turn a very dark green colour compared to the normal leaves.
I don't necessarily see that in your case.
Another possibility is to check your light and the distance to the plant. If you use a fan, you should make sure that your leaves don't get windburn, which also leads to "claws" on the tips of your leaves.
It is important not to overreact or flush the plant at such mild signs, this can cause more damage than cure. Keep an eye on your pH value and check that the light, amount of water and other conditions are right. Observe the whole thing for a few days and see if it improves. Happy Growing!