The ornamental design for wine tap handle, as shown and described.
FIG. 1 is a top, front perspective view of a wine tap handle showing my new design;
FIG. 2 is a front bottom perspective view; and,
FIG. 3 is a front elevation view thereof.
The broken lines of even length in the drawing depict portions of the wine tap handle that form no part of the claimed design. The broken lines of uneven length set forth the outer boundary of the claimed design.