The ornamental design for a vehicle, as shown and described.
FIG. 1 is a top, front and left side perspective view of a vehicle showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a top plan view thereof.
The portions of the vehicle shown in broken lines throughout the drawing views are for illustrative and environmental purposes that form no part of the claimed design.