The ornamental design for a dispenser, as shown and described.
FIG. 1 is a top, front, right perspective view of a dispenser showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a top, front, right perspective view of our dispenser shown with an exemplary unclaimed environment of a wall.
The broken lines showing the remainder of the dispenser form no part of the claimed design. The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The broken line disclosure of a wall fragment and other elements are for illustrative purposes only and form no part of the claimed design.