We claim the ornamental design for package sleeve, as shown and described.
FIG. 1 is a perspective view of package sleeve;
FIG. 2 is a front view of the package sleeve shown in FIG. 1;
FIG. 3 is a back view of the package sleeve shown in FIG. 1;
FIG. 4 is a left side view of the package sleeve shown in FIG. 1;
FIG. 5 is a right side view of the package sleeve shown in FIG. 1;
FIG. 6 is a top view of the package sleeve shown in FIG. 1; and,
FIG. 7 is a bottom view of the package sleeve shown in FIG. 1.
In the drawings, the evenly spaced broken lines depict environmental subject matter only that forms no part of the claim; the dot-dash lines represent boundaries of the claimed design and form no part thereof.