The ornamental design for the foot pedal, as shown and described.
FIG. 1 is a perspective view of a foot pedal of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a right side view, the left side view being a mirror image thereof.
The broken line showing of a trash can is included for the purpose of illustrating environment and forms no part of the claimed design.
