Update German localization strings (#261)

* Update German localization strings

Improve German translations and use informal addressing

* Fix typo in German localization string

Changed "Bitte kontaktiere deinen IT Support" to "Bitte kontaktiere deinen IT Support"

Author: AirBookMac

src/Support/de.lproj/Localizable.strings

@@ -27,7 +27,7 @@
 "Quit" = "Schließen";
 "Are you sure you want to quit?" = "Sicher, dass du beenden möchtest?";
 "An error occurred" = "Ein Fehler ist aufgetreten";
-"Please contact IT support" = "Bitte kontaktiere deinein IT Support";
+"Please contact IT support" = "Bitte kontaktiere deinen IT Support";
 "Not Connected" = "Nicht verbunden";
 "IP Address" = "IP Adresse";
 "No IP Address" = "Keine IP Adresse";