We claim the ornamental design for footwear, as shown and described.
FIG. 1 is a front perspective view of footwear, showing our new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof; and,
FIG. 6 is a top view thereof.
The broken line on the shaded area represents stitching and forms no part of the claimed design. All other broken lines depict portions of the footwear that form no part of the claimed design.