The ornamental design for a skylinepop-up card, as shown and described.
FIG. 1 is a perspective view of a skyline pop-up card showing my new design;
FIG. 2 is an enlarged view of the portion of the skyline pop-up card depicted in the detail circle of FIG. 1;
FIG. 3 is a top view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a rear view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines in the figures depict environmental subject matter only and form no part of the claimed design. The dot-dashed lines in the figures show borders of the subject matter being claimed. The dot-dashed lines form no part of the claimed design.