Former Deputy here.
If he is going to pull you over for that he has something else in mind bigger.
Pulling someone over for no license plate light is the most petty reason in the world...........sure way to get in trouble with the Chief or Sheriff in the morning.
The only time we ever did it was when we had a known meth cooker if their light was out..........good op. to sniff for anhydrous.
You have nothing to worry about
Sleep tight