Fix LDAP user registration (#229)

Fix LDAP user registration (#229)

Simple fix for LDAP user registration. I'm not sure what changed but I managed to get Akkoma running in a debug session and figured out it was missing a match for an extra value at the end. I don't know Elixir all that well so I'm not sure if this was the correct way to do it... but it works. :)

Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/229
Co-authored-by: nullobsi <me@nullob.si>
Co-committed-by: nullobsi <me@nullob.si>