The ornamental design for a stringlight, as shown and described.
FIG. 1 is a perspective view of a string light showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back 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;
FIG. 7 is a bottom view thereof;
FIG. 8 is an enlarged view of the selected portion 8 in FIG. 1; and,
FIG. 9 is an enlarged view of the selected portion 9 in FIG. 1.
The broken lines shown in the drawing are for the purpose of illustrating the boundaries of the enlarged fragments shown in FIGS. 8 and 9 and form no part of the claimed design. The string light is shown with symbolic breaks in its length and the appearance of any portion of the string light between the pairs of break lines, or beyond the single break line, form no part of the claimed design.