The ornamental design for awning lead rail, as shown and described.
FIG. 1 is a perspective view of the present invention shown a bottom and front, there being no claim to any design of the top and back of the lead rail;
FIG. 2 is a side elevation view of the present invention;
FIG. 3 is a bottom plan view of the present invention showing an arrangement of lights and speaker opening; and,
FIG. 4 is a bottom plan view of an alternative embodiment of the present invention with no claim to the speaker openings.