We claim the ornamental design for a faucet accessory, as shown and described.
FIG. 1 illustrates a perspective view of a faucet accessory showing a first embodiment of our new design;
FIG. 2 illustrates a front elevational view of a faucet accessory showing a first embodiment of our new design; and,
FIG. 3 illustrates an end view of a faucet accessory showing a first embodiment of our new design.
Top, rear elevational, and bottom views not shown are identical to the front elevational view shown in FIG. 2, and the end view not shown is identical to the end view shown in FIG. 3.