[Tails-l10n] [fr](review) press, license

Hello, please review.
I also fix a mistake in the english version of "License and source code
distribution".

Repo: https://git-tails.immerda.ch/xin/tails/
Branch: translate/presslicense
Last Commit: e668f715f3b375be052328ea0ad8286a1610e70d

Cheers.
xin