The ornamental design for a footwear, as shown and described.
FIG. 1 is a front perspective view of a shoe showing my new design;
FIG. 2 is a left side view of the shoe shown in FIG. 1;
FIG. 3 is a right side view of the shoe shown in FIG. 1;
FIG. 4 is a front view of the shoe shown in FIG. 1; and,
FIG. 5 is a top view of the shoe shown in FIG. 1.
The broken line showing of the sole, heel, heel cap, buckle, back strap, and portion of the upper is for illustrative purposes only and forms no part of the claimed design.