The ornamental design for a footwear, as shown and described.
FIG. 1 is a perspective bottom view of the footwear showing my new design.
FIG. 2 is a front view thereof.
FIG. 3 is a back view thereof.
FIG. 4 is a right view thereof.
FIG. 5 is a left view thereof.
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a top view thereof.
The broken lines in the figures are for the purpose of depicting portions of footwear and form no part of the claim. Claimed surfaces of footwear are shown with surface shading. Surfaces between solid lines without surface shading form no part of the claim.