The ornamental design for a vehicle, as shown and described.
FIG. 1 is a right, front perspective view of a vehicle showing my new design;
FIG. 2 is a left, rear perspective view thereof;
FIG. 3 is a front view thereof.
FIG. 4 is a rear view thereof.
FIG. 5 is a left side view thereof.
FIG. 6 is a right side view thereof; and,
FIG. 7 is a top view thereof.
Any elements shown in broken lines form no part of the claimed invention, and are instead included to show environmental aspects thereof. Also, broken lines shown adjacent to any shaded portions form an unclaimed boundary of the design.