The ornamental design for a confectionerypiece, as shown and described.
FIG. 1 illustrates a front right side perspective view of the confectionery piece;
FIG. 2 illustrates a rear left side perspective view of the confectionery piece of FIG. 1;
FIG. 3 illustrates a top rear left side perspective view of the confectionery piece of FIG. 1;
FIG. 4 illustrates a rear bottom right side perspective view of the confectionery piece of FIG. 1; and,
FIG. 5 illustrates a right side elevation view of the confectionery piece of FIG. 1, wherein the left side elevation view is a mirror image of this view.