I claim the ornamental design for a ring, as shown and described.
FIG. 1 is a perspective view of a ring, showing my new design;
FIG. 2 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;
FIG. 3 is a front elevational view thereof, the rear elevational view being identical thereto;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines showing a logo in FIGS. 1 and 4 depict environmental matter and form no part of the claimed design. The text that spells the word “TeamO” in the drawings and forming part of the claimed design is a trademark of Teamo, LLC, of Edmond, Okla.