The ornamental design for a tonercartridge, as shown and described.
FIG. 1 is a perspective view of a toner cartridge showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a bottom perspective view of the toner cartridge.
The broken lines in the figures show portions of the toner cartridge that form no part of the claimed design and depict environmental subject matter and/or an unclaimed boundary line.