[Tails-l10n] Release schedule for Tails 6.0

Hi,

We still don't know who will be the RM for Tails 6.0

The current plan is:
- Monday, February 26: build images, start testing
- Tuesday, February 27: releasing

@testers, please let the RM know how much time you'll have for manual QA
from Monday 17:00 to Tuesday 11:00 (Europe/Berlin)

--
boyska