The ornamental design for footwear, as shown and described.
FIG. 1 is a perspective view of footwear showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof, the right side elevation view is a mirror image thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken line showing on the edge of the trim of the footwear represents top stitching and is included for the purpose of illustrating only and forms no part of the claimed design.