The ornamental design for seating, as shown and described.
FIG. 1 shows a right side elevation view of all three embodiments of seating according to the present invention, the left side view being a mirror image of the right side elevation view;
FIG. 2 shows a front view of the first embodiment of seating according to the present invention;
FIG. 3 shows a top view of the seating of FIG. 2.
FIG. 4 shows a front view of the second embodiment of seating according to the present invention;
FIG. 5 shows a top view of the seating of FIG. 4;
FIG. 6 shows a front view of the third embodiment of seating according to the present invention; and,
FIG. 7 shows a top view of the seating of FIG. 6.
Portions or features of the seating not shown in the drawings form no part of the claimed design.