devel/renpy: update to 7.4.7

Changes: https://www.renpy.org/release/7.4.7 (see Announcment)
Changes: https://www.renpy.org/doc/html/changelog.html#renpy-7-4-7
Reported by: Repology

(cherry picked from commit 23be29fba46fb743be95b315740e68dc2716e23c)