Release 0.3.8

What's Changed

• Garmin's API rejects commas in hole-numbers outright (encoded or not) — only - is accepted as a separator. Comma-separated input (e.g. "1,2,3") is now automatically normalized to - before the request is sent. (#377) get_golf_shot_data()
• demo.py removed a dead menu entry calling a nonexistent set_body_composition method (use add_body_composition instead).
• Fixed a menu key collision that made "Get scheduled workout by ID" unreachable, and added missing menu entries for delete_workout and unschedule_workout.
• Corrected a mislabeled log/display string for schedule_workout.
• README.md fixed a copy-paste bug in the strength-workout example (api.upload_strength_workout → client.upload_strength_workout), a stale badge link pointing at main instead of master, and added the missing Python 3.12+ requirement.