The ornamental design for a productpackaging, as shown and described.
FIG. 1 is a back view of a product packaging in accordance with my design;
FIG. 2 is a side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a front perspective view thereof; and,
FIG. 5 is a rear perspective view thereof with a product therein.
The broken lines present in the drawings are for illustrative purposes only and form no part of the claimed design. The product shown in broken lines in FIG. 5 illustrates environmental matter that forms no part of the claimed design.