Describe the bug
can't download 6.4.0 even if it's out and can be downloaded with the official installer

To Reproduce
Steps to reproduce the behavior:

1. run aqt with this command: python3 -m aqt install-qt mac desktop 6.4.0
2. See error

ERROR : Failed to locate XML data for Qt version '6.4.0'.
==============================Suggested follow-up:==============================

• Please use 'aqt list-qt mac desktop' to show versions available.

Expected behavior
it working

Desktop (please complete the following information):

• OS: macOS
• aqt version v2.2.3

Additional context
it made me update the mantainance tool trying to update with the official installer, perhaps smth changed there?