The ornamental design for a lanyard, as shown and described.
FIG. 1 is a top, front, and right perspective view of our new design for a lanyard;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a left side view thereof; and,
FIG. 7 is a right side view thereof.
The spaced apart elongated stadium shapes arranged in a square at the bottom front and rear, which protrude from the surface, and which may appear as dashed lines, represent stitching that is included in the claim.