[Tails-l10n] [fr](review) keeping the documentation up-to-da…

Hi,


please review the following commits, in matsa/master:

* 51b8ac2 - [fr] keeping the documentation up-to-date (2)
* 29e027b - [fr] keeping the documentation up-to-date

As a reminder, it's possible to find fuzzy strings with the following
command line:
https://tails.boum.org/contribute/l10n_tricks/#index4h1


Thanks, and cheers