The ornamental design for a boottray, as shown and described.
FIG. 1 is a perspective view of a boot tray showing my new design;
FIG. 2 is an inverted exploded perspective view thereof, with the bottom portion removed for convenience of illustration;
FIG. 3 is an exploded perspective view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a left side view thereof; and,
FIG. 6 is a front view thereof.
The broken lines in the drawings are for the purpose of illustrating ridges and other portions of the boot tray that form no part of the claimed design. The surface shading, if any, illustrated in the drawings is provided merely to highlight the contour of the design; it is not intended to be illustrative of texture or gloss.