The ornamental design for a faucet, as shown and described.
FIG. 1 is a perspective view of the front, top, and right side of a faucet embodying our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the drawings form no part of the claimed design. The separation and bracket in the spout portions of the faucet indicates spout portions of indeterminate length, the precise lengths of the spout portions not being claimed.