The ornamental design for a shoe upper, as shown and described.
FIG. 1 is a front perspective view of a shoe upper showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a side view thereof; and,
FIG. 4 is an opposite side view thereof.
The even-length broken lines within the shaded area represent stitching. The uneven-length broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The uneven-length broken lines showing the remainder of the shoe represent unclaimed subject matter and form no part of the claimed design.