The ornamental design for nursing cover, as shown and described.
FIG. 1 is a rear view of a nursing cover in accordance with the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view of a hood portion of FIG. 1, whereby the hood portion is shown detached from the nursing cover in FIG. 3;
FIG. 4 is a perspective view thereof, shown without the hood portion in FIG. 3; and,
FIG. 5 is a rear perspective view thereof.
The broken lines showing stitching lines in the nursing cover is for the purpose of depicting portions of the nursing cover having stitching and forms no part of the claimed design. The humanoid figure in FIGS. 4 and 5 are for the purposes of depicting environment and forms no part of the claimed design.