The ornamental design for a nameplate, as shown and described.
FIG. 1 is a perspective view of a nameplate showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a rear elevational view thereof.
The dash-dash broken lines shown in the drawings illustrate portions of the nameplate that form no part of the claimed design. The dot-dash broken lines define the boundaries of the claim and form no part thereof.