The ornamental design for a bedframe, as shown and described.
FIG. 1 is a front elevation view of a bed frame showing our new design;
FIG. 2 is a left side elevation view thereof; and,
FIG. 3 is a top plan view thereof.
The dashed broken lines illustrating portions of the bed frame are for environmental purposes only and form no part of the claimed design. Views of the bed frame that are not shown in the figures form no part of the claimed design. The claim of the current application is directed at the entire bed frame, including both the headboard and the footboard.