[Tails-l10n] Release schedule for Tails 3.13

Hi,

I'll be the release manager for Tails 3.13 up to, and including, the
release of 3.13~rc1. Then someone else, likely kibi, will take over
until 3.13 final is out.

This release will be a hybrid bugfix/major release:

- It'll be major in the sense that it will upgrade Tor Browser to
8.5, which will include major changes.

- It won't be major in the sense that we may lack time to prepare and
review major other changes in time for the freeze. We might also
decide to stick to the frozen APT snapshots used by 3.12.

So please base on the *stable* branch any work targeted at 3.13.

If a Tor Browser 8.5 beta is ready and integrated into Tails
by then:

- March 8: build and upload Tails 3.13~rc1
- March 9: test and release Tails 3.13~rc1

Otherwise, we may have to skip the RC and instead send a call
for testing later, for an unofficial nightly built image.

And then, in any case:

- March 18: build and upload Tails 3.13
- March 19: test and release Tails 3.13

Anyone who's part of our internal QA process ("manual test suite"),
please let me know if you're available on March 9 to test the RC,
and/or on March 19 to test the final release. Thanks in advance!

Cheers,
--
intrigeri