FIG. 1 is a top front perspective view of a spotlight according to the present design; FIG. 2 is a bottom front perspective view thereof; FIG. 3 is a front perspective view thereof; FIG. 4 is a rear perspective view thereof; and, FIG. 5 is a cross-sectional view along the lines 5-5 shown in FIG. 3. The portions shown in broken lines do not form part of the claimed design.