[Tails-l10n] (review)[de] wiki/src/doc/first_steps/startup_o…

Hi,
I updated the updated and translated the new strings from the start
options page.

Please review:
https://gitlab.com/spriver/tails.git
branch: de-startup_options
HEAD commit: 35b53b312f Updated strings and translated new ones

Affected files:
wiki/src/doc/first_steps/startup_options.de.po


Cheers!
spriver