The ornamental design for a headwrap, as shown and described.
FIG. 1 is a front perspective view of a head wrap;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof; and,
FIG. 4 is a rear view of the head wrap shown in a position of use.
The broken line outline of the partial human figure in FIG. 4 assists in illustrating how the claimed design may appear when worn, but forms no part of the claimed design. The broken lines along the interior perimeter edges of the head wrap define portions of the head wrap that form no part of the claimed design.