Is the scholarship through the second school? (vs a 3rd party). Ask them if they can “hold” your admission until the scholarship notifications come out? If they can, then good. If not, then you may be stuck with the first school.
Because then you can put down the deposit on the first school, then if the school gives you the scholarship and keeps your admission, then you coudl withdraw from the first school (and maybe lose your deposit) and then accept the second.