[3.12] gh-122040: reword `Modules/xxmodule.c` module-level comment (GH-132201) (#132208)

gh-122040: reword `Modules/xxmodule.c` module-level comment (GH-132201)
(cherry picked from commit af8d1b95377917036aaedf18b9cc047d8877259c)

Co-authored-by: Sonny Ding <93831983+sonnyding1@users.noreply.github.com>