FIG. 1 is a front perspective view of a faucet assembly showing our design; FIG. 2 is a front elevational view thereof; FIG. 3 is a right side elevational view thereof; the left side elevational view being a mirror image thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a top plan view thereof; and, FIG. 6 is a bottom plan view thereof. The broken lines are for illustrative purposes only and form no part of the claimed design.