[Tails-l10n] [fr][review] Documentation index and misc.

Hi,

please review the following modifications in elouann/translation :

git fetch --all
git diff origin/master..elouann/translation

I already tested it locally.

The commits in details :

54f3b52 [fr] doc/advanced_topics/wireless_devices.fr.po
0e18d2e [fr] Updating the index (2)
8ebb354 [fr] Updating the index
ec60ccc [fr] Review of atomike/doc-encryption_and_privacy

Cheers,
~ elouann