The ornamental design for a grill, as shown and described.
FIG. 1 is a perspective view of the front right-side of a grill according to our design;
FIG. 2 is an elevation view of the front thereof;
FIG. 3 is an elevation view of the rear thereof;
FIG. 4 is an elevation view of the right side thereof;
FIG. 5 is an elevation view of the left side thereof;
FIG. 6 is a plan view of the top thereof; and,
FIG. 7 is a plan view of the bottom thereof.
Throughout the Figures, if and where shown: (i) the broken lines showing additional structure of the grill and/or its environment are for illustrative purposes only and form no part of the claimed design; (ii) the dotted/dashed lines adjacent shaded surfaces represent unclaimed boundaries of the claimed design; and (iii) the unshaded surfaces do not form part of the claimed design. Portions of the grill not shown in the Figures and not otherwise described in this specification do not form part of the claimed design.