FIG. 1 is a front, top and left side perspective view of a toner cartridge, showing my new design;

FIG. 2 is a rear, top and right side perspective view thereof;

FIG. 3 is a rear, top and left side perspective view thereof;

FIG. 4 is a rear, bottom and right side perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged right side view thereof; and,

FIG. 10 is an enlarged left side view thereof.

The broken lines depict environmental subject matter only and form no part of the claimed design.