I claim the ornamental design for a jersey, as shown and described.
FIG. 1 is a left side perspective view of a jersey, showing my new design;
FIG. 2 is an enlarged perspective view of the claimed region of FIG. 1;
FIG. 3 is a front view thereof; and,
FIG. 4 is a right side perspective view thereof.
The broken lines illustrating the wavy boundary in FIGS. 2-4 represent boundaries of the enlarged view. The remaining broken lines illustrating the jersey represent portions of the article that form no part of the claimed design.