Allowed Dates styles missing for month picker

[DmitryTar1]

Describe the bug
If using allowed-dates and month picker, it doesn't allow to select wrong month (which is correct), but to user all month displayed the same and there are no class or property to let user know some months are not allowed to be selected. On screenshot only two months allowed to be selected.

To Reproduce
Steps to reproduce the behavior:

1. Use code from documentation https://vue3datepicker.com/props/calendar-configuration/#allowed-dates
2. Use month picker
3. All months look the same.

Expected behavior
It works the same way as disabled-dates, so if the date is not allowed - it will be shown (month would look like disabled and not allowed to click)

Screenshots

Desktop & mobile (please complete the following information):

• Browser chrome, but I suppose all
• Library version 9.0.3