We claim the ornamental design for a syrup dispenser, as shown and described.
FIG. 1 is a perspective view of our syrup dispenser.
FIG. 2 is a left side view, the right side view being a mirror image thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a bottom view thereof.
FIG. 5 is a front view thereof; and,
FIG. 6 is a rear view thereof.
The broken lines shown in FIGS. 1, 4, and 6 of the syrup dispenser is for the purpose of illustrating environment only, and forms no part of the claimed design.