The ornamental design for a workstation, as shown and described.
FIG. 1 is a front perspective view of a workstation, showing my new design;
FIG. 2 is front view thereof;
FIG. 3 is rear view thereof;
FIG. 4 is right side view thereof;
FIG. 5 is left side view thereof;
FIG. 6 is top view thereof;
FIG. 7 is bottom view thereof;
FIG. 8 is an exploded view of FIG. 1; and,
FIG. 9 is a perspective view of a workstation in an environment of use.
The broken lines in the figures immediately adjacent the solid lines represent the bounds of the claim, and the broken lines and the area within the broken lines represent unclaimed portions of the present invention. None of the broken lines form a part of the claimed design.