The ornamental design for a dispenser, as shown and described.
FIG. 1 is a top, front, and left isometric view of an ornamental design for a dispenser;
FIG. 2 is a front elevational view of the dispenser of FIG. 1;
FIG. 3 is a rear elevational view of the dispenser of FIG. 1;
FIG. 4 is a left side elevational view of the dispenser of FIG. 1;
FIG. 5 is a right side elevational view of the dispenser of FIG. 1; and,
FIG. 6 is a top plan view of the dispenser of FIG. 1.
The dash-dash-dash lines are included for the purpose of illustrating portions that form no part of the claimed design. The dash-dot-dash lines are included for the purpose of illustrating boundary lines and form no part of the claimed design. Further, the oblique shade lines depict transparent or translucent surfaces or materials.