The ornamental design for a sprayer, as shown and described.
FIG. 1 is a perspective view of a sprayer showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dashed broken lines represent portions of the sprayer that form no part of the claimed design. The long dash-short dash broken line in FIG. 4 represents the boundary of the claimed design, and form no part thereof. The oblique line shading shown in the drawings indicates a transparent or translucent surface. Internal structure of the transparent or translucent surface is omitted. No claim is made to any elements inside the transparent or translucent surface.