The ornamental design for a confection, as shown and described.
FIG. 1 is a perspective view of a confection showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof; and,
FIG. 6 is a top view thereof.
The greyscale shading shown in FIGS. 1-6 is provided solely for the purpose of showing surface contours. The dash-dot lines in FIGS. 1-6 and the areas within the dash-dot lines shown in phantom show portions of the confection that form no part of the claimed design. The bottom view is omitted and forms no part of the claimed design.