The ornamental design for a switch, as shown and described.
FIG. 1 is a top isometric view of an embodiment of the switch.
FIG. 2 is a bottom isometric view of the switch of FIG. 1.
FIG. 3 is a rear side elevation view of the switch of FIG. 1.
FIG. 4 is a right side elevation view of the switch of FIG. 1.
FIG. 5 is a front side elevation view of the switch of FIG. 1.
FIG. 6 is a left side elevation view of the switch of FIG. 1.
FIG. 7 is a top plan view of the switch of FIG. 1; and,
FIG. 8 is a bottom plan view of the switch of FIG. 1.
The evenly dotted broken lines in the figures illustrate unclaimed features of the switch and form no part of the claimed design. The dash-dot-dash broken lines in the figures are boundary lines of unclaimed portions of the switch that form no part of the claimed design.