The ornamental design for a cap, as shown and described.
FIG. 1 is a front view of a cap showing my new design;
FIG. 2 is a rear view of the cap;
FIG. 3 is a right side view of the cap;
FIG. 4 is a left side view of the cap;
FIG. 5 is a top view of the cap;
FIG. 6 is a bottom view of the cap; and,
FIG. 7 is a top rear side perspective view of the cap in use.
The broken lines along the interior of the cap portrayed in FIGS. 2 and 6 define the bounds of the claim and form no part of the claimed design. The broken line outline of the partial human figure in FIG. 7 depicts environmental structure to assist how the claimed design may appear when worn and forms no part of the claimed design.