The ornamental design for a bowl, as shown and described.
FIG. 1 is a top perspective view of a bowl;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a right elevation view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the bowl that form no part of the claimed design. The long-dash/short-dash line shows a boundary of the claim and forms no part of the claimed design. The portions of the bowl above the long-dash/short-dash line form no part of the claimed design.