The ornamental design for a faucet, as shown and described.
FIG. 1 is a perspective view of a faucet;
FIG. 2 is a front view of the faucet of FIG. 1;
FIG. 3 is a rear view of the faucet of FIG. 1;
FIG. 4 is a side view of the faucet of FIG. 1;
FIG. 5 is a bottom plan view of the faucet of FIG. 1; and,
FIG. 6 is a top plan view of the faucet of FIG. 1.
The broken lines of FIGS. 2, 3, and 5 are for the purpose of illustrating interior structures that may be included in the faucet and form no part of the claimed design.