The ornamental design for a belt, as shown and described.
FIG. 1 is a front perspective view of a belt showing my new design.
FIG. 2 is a top plan thereof shown broken apart in order to allow a larger scale depiction of the full plan view. The dash-dot lines seen in FIG. 2 show the order of assembly and form no part of the claimed design.
FIG. 3 is a second top plan view thereof.
FIG. 4 is a bottom plan view thereof.
FIG. 5 is an enlarged right elevation view thereof.
FIG. 6 is an enlarged left elevation view thereof; and,
FIG. 7 is an enlarged, partial front elevation view thereof.
The broken lines illustrate portions of the belt that form no part of the claimed design.