[Tails-l10n] (review)[de] wiki/src/donate/thanks.de.po

Hi,
I translated the thanks page after the donation was placed. I needed to
make some tweets a bit shorter because of the 140 character limit on
twitter (but did not change the overall meaning).
Please review:

https://gitlab.com/spriver/tails.git
branch: de_donate_thanks
HEAD commit: 9ef895f Adapted translation to former pages

Affected files:
wiki/src/donate/thanks.de.po

Cheers!
spriver