The ornamental design for a yard torch, as shown and described.
FIG. 1 is a perspective view of my new yard torch design with the dash lines showing a yard environment for illustrative purposes only and forms no part of the claimed design;
FIG. 2 is an elevation of my new design; it being understood that all side elevations are the same;
FIG. 3 is an elevation of the torch portion of my new design, it being understood that all side elevations are the same;