Update release notes for 3.12.9 release

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Translation updates for 3.12.09 release

(cherry picked from commit eff238e560d0a3b4446530d6fe6632fad7fd4142)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Increment version for 3.12.9 release

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>