The ornamental design for a pegboard, as shown and described.
FIG. 1 is a perspective view of a pegboard 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 dash-dot-dash-dot broken line showing immediately adjacent the shaded areas represents boundaries to the claimed design and forms no part of the claimed design. The dash-dash-dash-dash broken lines shown in the figures represent portions of the pegboard that form no part of the claimed design.