The ornamental design for a froglure, as shown and described.
FIG. 1 is a top view of the frog lure of the invention;
FIG. 2 is a right side view of the frog lure of the invention;
FIG. 3 is a left side perspective view of the frog lure of the invention;
FIG. 4 is a rear view of the frog lure of the invention;
FIG. 5 is a bottom view of the frog lure of the invention; and,
FIG. 6 is a front view of the frog lure of the invention.
The broken lines in the Figures are for the purpose of illustrating the environment in which the design is associated and form no part of the claimed design.