Cycling '74 updates Max to v7.2.1

Cycling '74 has updated Max to v7.2.1.

Fixed Bugs:

• attrui: fixed crash when receiving some messages.
• Max toolbars: fixed crash when showing toolbars when patcher window is maximized.
• Patchers: templates and new patchers properly get loadbanged.
• poly~: fixed issue with stuck notes when steal set to 0.
• poly~: fixed notemessage crash after mpeevent messages.
• poly~: properly sends note-offs in certain voice-stealing cases.
• Prototypes: working for live.* UI objects.
• standalone: fixed problems with making standalones from Projects.