The ornamental design for a hotdog fork, as shown and described.
FIG. 1 is a front perspective view of a hot dog fork;
FIG. 2 is a rear perspective view of the hot dog fork of FIG. 1;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a right side elevational view thereof; and,
FIG. 8 is a left side elevational view thereof.
The ornamental design that is claimed is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.