[Tails-l10n] Release schedule for Tails 4.24

Hi,

Tails 4.24 is scheduled for November 2.
We haven't fully decided who is gonna be the release manager yet: I am
listed as RM in the calendar, but this might change.

Dear manual testers, please tell tails-rm@??? how much manual
testing you can do on:

- November 1, later afternoon CET
- November 2, morning CET

Cheers!