The ornamental design for a spotlight, as shown and described.
FIG. 1 is a perspective view of the spotlight;
FIG. 2 is a front view of the spotlight;
FIG. 3 is a left side view of the spotlight;
FIG. 4 is a right side view of the spotlight;
FIG. 5 is a top view of the spotlight; and,
FIG. 6 is a bottom view of the spotlight.
The back view of the spotlight and broken lines in FIGS. 1-6 form no part of the claimed design. The broken lines represent portions of the Spotlight that form no part of the claimed design.