Fix typos in de-DE translation: "Augabe", "person"

[geberl]

I just found three typos in messages/de-DE.json:

• Augabe -> Ausgabe
  • https://github.com/spliit-app/spliit/blob/main/messages/de-DE.json#L147
  • https://github.com/spliit-app/spliit/blob/main/messages/de-DE.json#L274
• person -> Person
  • https://github.com/spliit-app/spliit/blob/main/messages/de-DE.json#L301