[Tails-dev] [review'n'merge] update PO files in testing bran…

Hello, it's an update of PO files in testing branch, so we can translate
recent changes.
It's the result of a build, I don't change anything.

Please review and merge.

Repo: https://git-tails.immerda.ch/xin/tails/
Branch: po_files_testing
Last Commit: 5c23279bc18e49b2711eb8792373b3363e6f11a1

Cheers.
xin