We claim the ornamental designs for the workstation, as shown and described.
FIG. 1 shows a perspective view of a workstation;
FIG. 2 shows a top view of the workstation of FIG. 1;
FIG. 3 shows a bottom view of the workstation of FIG. 1;
FIG. 4 shows a front view of the workstation of FIG. 1;
FIG. 5 shows a rear view of the workstation of FIG. 1;
FIG. 6 shows a right side view of the workstation of FIG. 1; and,
FIG. 7 shows a left side view of the workstation of FIG. 1.
Any broken lines in FIGS. 1-7 are for environmental purposes only and form no part of the claimed designs. The ornamental designs which are claimed are shown in solid lines in the drawings. For the bottom views of the workstation of FIG. 3, for those areas devoid of shading or phantom lines they are flat and devoid of ornamentation.