FIG. 1 is a perspective view of an outdoor torch safety cap showing my new design; FIG. 2 is a front elevational view thereof, the rear being the same in appearance; FIG. 3 is a left-side elevational view thereof, the right side being the same in appearance; FIG. 4 is a top plan view thereof; and, FIG. 5 is a bottom plan view thereof. The portion of the outdoor torch safety cap shown by a broken line forms no part of the claimed design.