They didn’t notice that during the lease end inspection? If it’s hidden pretty well, you might try and risk it by simply returning it at the dealer and walk away.
You literally give them both keys. They take the plates/tags off and make you sign a piece of paper. Usually done by a younger salesman etc.
If they don’t see it you’re off the hook.
If you don’t want go that route, I would just go down to your local junk yard or auto glass place and get a used windshield for less than half of what safelite quoted . Would not put a new windshield on a car that I’m returning. That’s just me…