Unbound 1.9 tls-ciphers Settings

[John]

Hello Unbound List

Since this relaease 1.9. is it possible, to make settings for
tls-ciphers
tls-ciphersuites
tls-session-ticket-keys

Unfortunately nowhere is written which values can be used
In https://nlnetlabs.nl/documentation/unbound/unbound.conf/
is only written
> tls-ciphers: <string with cipher list>

If I wants to set i.e. only TLS 1.3 how have I to write it
tls-ciphers: tls-1.3
or have I to use tls-ciphersuites?

Maybe someone can tell me about the values which I can use?

Regards
John