Bug 7143: Release team for 3.22

Bug 7143: Release team for 3.22

See: http://wiki.koha-community.org/wiki/Roles_for_3.22
The 3.20 roles are moved to the Development section. Note that we did
not add the Bug wranglers role under Development until now. If that
should change, please provide a follow-up.

Test plan:
Verify that all roles are covered correctly.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Seems correct for me, no errors.

Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>