The ornamental design for a footwear, as shown and described.
FIG. 1 is a perspective view of a footwear showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines on the upper portions of the footwear in the drawings illustrate stitching and form no part of the claimed design. The broken lines on the bottom sole of the footwear in the drawings illustrate portions of the footwear that forms no part of the claimed design.