We claim the ornamental design for a faucet, shown and described.
FIG. 1 is a top, front, left side perspective view of a faucet showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines immediately adjacent to the shaded areas represent the bounds of the claim, while the other broken lines depict portions of the faucet. The broken lines form no part of the claimed design.