The ornamental design for a footwear, as shown and described.
FIG. 1 is a rear perspective view of a 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 view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view.
The dot-dash lines illustrate the boundary of the claimed design and form no part thereof. The broken lines of even length illustrate environment and form no part of the claimed design. The portions of the figures shown in lighter contrast illustrate the environment and form no part of the claimed design.