The ornamental design for a cookingpot, as shown and described.
FIG. 1 is a perspective view of the cooking pot showing my new design;
FIG. 2 is a top view of the cooking pot of my new design.
FIG. 3 is a side view of the cooking pot of my new design.
FIG. 4 is a front end view of the cooking pot of my new design showing a portion of the handle extending from the front of the pot; and,
FIG. 5 is an end view of the rear of the cooking pot of my new design.
The broken lines in FIGS. 1, 2, 3, 4, and 5, showing a handle connected to the pot, are for illustrative purposes only, and form no part of the claimed design.