The ornamental design for a V-shaped swizzle stick, as shown.
FIG. 1 is a perspective view of a V-shaped swizzle stick showing my new design;
FIG. 2 is a front elevation view thereof, the rear elevation view being identical;
FIG. 3 is a left side elevation view, the right side elevation view being identical;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
In the drawings, the broken lines showing an embellishment for the V-shape swizzle stick in FIGS. 1-5 depict portions of the design that form no part of the claim.