Add Justus Reihs as author

[lnnrtwttkhn]

I would like to add @justus-reihs as an author.

To do this, add Justus as an author in the _authors.yml file (see here).

For details, see the Quarto documentation here.

Would you like to tackle this @justus-reihs and add yourself?

[justus-reihs]

I'm on it