The ornamental design for a furnishing, as shown and described.
FIG. 1 is a perspective view of a furnishing showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The uniform broken lines shown in the drawings are included for purposes of illustrating portions of the furnishing and form no part of the claimed design. The non-uniform broken lines that define the bounds of the claimed design form no part thereof.