The ornamental design for a tray, as shown and described.
FIG. 1 is a perspective view of a tray, showing my new design;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right-side elevation view thereof;
FIG. 5 is a left-side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a perspective view thereof, shown in use.
The broken lines showing whiskey glasses and a globe in FIG. 7 depicts environmental subject matter that forms no part of the claimed design, while the remaining broken lines shown in the drawings depict portions of the tray that form no part of the claimed design.