The ornamental design for a housekeepingcart, as shown and described.
FIG. 1 is a top left isometric view of a housekeeping cart showing our new design;
FIG. 2 is a top right isometric view thereof;
FIG. 3 is a top view thereof, shown in a larger scale;
FIG. 4 is a left side view thereof, shown in a larger scale;
FIG. 5 is a right side view thereof, shown in a larger scale;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the housekeeping cart and form no part of the claimed design.