[3.12] Simpler example of shallow dict export of a dataclass (GH-117812) (#117862)

Simpler example of shallow dict export of a dataclass (GH-117812)
(cherry picked from commit f303651b45649392bf718f970793ad65d9ded0b8)

Co-authored-by: Gouvernathor <44340603+Gouvernathor@users.noreply.github.com>