The ornamental design for a wineskirt, as shown and described.
FIG. 1 is a perspective view of the wine skirt showing our new design thereof;
FIG. 2 is a side view thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a bottom perspective view thereof.
The glass shown in broken lines in the drawing views represents unclaimed portions of a wine skirt which are included for the purpose of illustrating unclaimed environment only, and forms no part of the claimed design.