[Tails-l10n] (review)[de] 2.2.1 release notes

Hi,
please review the release notes for 2.2.1:

https://gitlab.com/spriver/tails.git
branch: de_tails_221
HEAD commit: 9f76308 Initial translation

Affected files:
wiki/src/news/version_2.2.1.de.po
wiki/src/security/Numerous_security_holes_in_2.2.de.po

Regarding the de_install_mac branch: it got broken these days because
some pages changed. I'll rebase it these days and then repush. So don't
work on it until I'll send a new mail ;)

Cheers!
spriver