devel/py-apscheduler: update to 3.10.3

Changes: https://github.com/agronholm/apscheduler/compare/3.10.1...3.10.3
Reported by: Repology, portscout

(cherry picked from commit b7427cd82ccfeeab931ba1fac69431d999ce1fcd)
(cherry picked from commit bcb41521efba89cd609ef4806169398b9741431c)
(cherry picked from commit 8cd16b20b96b170b7d8964c1b3c58ff5a985fac7)