[3.12] gh-120661: improve example for basic type hints (GH-120934) (#120988)

gh-120661: improve example for basic type hints (GH-120934)
(cherry picked from commit bb057ea1075e000ff3f0d6b27a2b7ca4117b4969)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>