The ornamental design for a cheering sockpennant, as shown and described.
FIG. 1 is a front view of the cheering sock pennant; the back view is a mirror image.
FIG. 2 is a side perspective view thereof; and,
FIG. 3 is a reference view showing how the cheering sock pennant can be used by a user.
Portions of the drawings delineated in broken lines showing environment or structure are for illustrative purposes only, and form no part of the claimed design.
Shading in the drawings represents material and is understood to be distributed uniformly.
Surfaces not shown form no part of the claimed design.