The ornamental design for a pegboard, as shown and described.
FIG. 1 is a perspective view of a lockable pegboard and pin apparatus according to the invention;
FIG. 2 is a front view of the invention shown in FIG. 1;
FIG. 3 is a bottom view of the invention shown in FIG. 1;
FIG. 4 is a top view of the invention shown in FIG. 1;
FIG. 5 is a right side view of the invention shown in FIG. 1;
FIG. 6 is a left side view of the invention shown in FIG. 1; and,
FIG. 7 is a rear view of the invention shown in FIG. 1.
The broken line showing immediately adjacent the shaded areas represents boundaries to the claimed design and forms no part of the claimed design. The broken lines shown in the figures represent portions of the pegboard that form no part of the claimed design.