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 another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged top plan view of the string light;
FIG. 10 is an enlarged bottom plan view thereof; and,
FIG. 11 is an enlarged view of portion 11 shown in FIG. 1.
The string light is shown with a symbolic break in its length and the appearance of any portion of the string light between the break lines form no part of the claimed design. The dash-dash broken lines in the drawings depict portions of the string light that form no part of the claimed design. The dot-dash broken lines represent boundaries of the enlarged portion and form no part of the claimed design.