The ornamental design for a boot, as shown and described.
FIG. 1 is a front, left, top perspective view of a boot according to the present design;
FIG. 2 is a left side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a rear view thereof; and,
FIG. 6 is a top view thereof.
The evenly spaced broken lines shown in the drawings are directed to environment, are for informational purposes only, and form no part of the claimed design.
The long and short broken lines are boundary lines, which define bounds of the claimed design. These boundaries do not exist in reality in the article embodying the design. It is understood that the claimed design extends to these boundaries but does not include the boundaries.