The ornamental design for a pedestal, as shown and described.
FIG. 1 is a front pespective view of a pedestal showing my new design;
FIG. 2 is a side elevational view, the opposite side and the two adjacent sides being mirror images thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a front perspective view with a representation of a design shown in dashed lines thereof.
The bottom view is not shown and forms no parts of the claimed design. The dashed lines represent environmental elements only and form no part of the claimed design.