[Tails-l10n] (review)[de] 2.3 release notes

Hi,
this time a bit delayed, but to stays complete, here the release notes
for version 2.3:

https://gitlab.com/spriver/tails.git
HEAD commit: ac159b1 Translated release notes for 2.3
Affected files:
wiki/src/news/version_2.3.de.po
wiki/src/security/Numerous_security_holes_in_2.2.1.de.po

Cheers!
spriver