The ornamental design for awning lead rail, as shown and described.
FIG. 1 is a perspective view of the present invention showing the bottom and front views, 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, the opposite side being a mirror image;
FIG. 3 is a bottom plan view of the present invention showing an arrangement of lights and speaker opening and is a front elevation view of the present invention; and,
FIG. 4 is a front elevation view of the present invention.