The ornamental design for a shoe sole, as shown and described.
FIG. 1 is a bottom plan view of a shoe sole showing our new design.
FIG. 2 is a right side elevational view thereof.
FIG. 3 is a left side elevational view thereof.
FIG. 4 is a front elevational view thereof; and,
FIG. 5 is a rear elevational view thereof.
The broken lines showing a shoe upper throughout the views illustrate the portion of the design that forms no part of the claim.