I claim the ornamental design for a fishing lure, as shown and described.
FIG. 1 is a perspective view of the fishing lure showing my new design in use, including a fishing line, a fishing hook, and optional fringe, wherein the phantom lines illustrating the fishing line, the fishing hook, and the optional fringe do not form any part of the design;
FIG. 2 is a perspective top, front view of the fishing lure;
FIG. 3 is a first side view thereof;
FIG. 4 is a second side view thereof, being rotated about a longitudinal axis at 45 degrees from the first view;