I claim the ornamental design for a pot lid holder, as shown and described.
FIG. 1 is a front side perspective view of a pot lid holder showing my new design;
FIG. 2 is a rear side perspective view thereof;
FIG. 3 is a left side elevational view thereof, the right side elevational view being a mirror image of that shown;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a top plan view thereof.
The broken-line disclosure is understood to illustrate portions of the article in which the claimed design is embodied, but which form no part of the claimed design.