[Tails-l10n] [fr](review) testing

Hello, I update 3 pages in the testing branch.
I also add a missing punctuation in an english page.
Please review.

Repo: https://git-tails.immerda.ch/xin/tails/
Branch: translate/testing
Last Commit: 30623f69ca0c5a3ad84b9f249996def1918b6554

Cheers.
xin