tableau_server.subscriptions fails if any subscriptions have schedule frequency="Daily" & interval hours="24"

Versions

• Tableau Cloud: 2024.1.0
• Python version: 3.11.4
• TSC library version: 0.30

To Reproduce
tableau_server_obj.subscriptions

Results
ValueError: Invalid interval 24.0 not in {0.25, 0.5, 2, 1, 4, 6, 8, 12}

To fix
update interval_item.py, line 139:

VALID_INTERVALS = {0.25, 0.5, 1, 2, 4, 6, 8, 12, 24}