I updated my Github bio to use nprofile. It seems to work now on njump.
However it's "outbox" only; the bot can't post there until this: https://github.com/scsibug/nostr-rs-relay/issues/209
It seems more robust if the bot goes to the mentioned relay(s), fetch the kind:10002 event, obtain the READ relays and post there.
https://github.com/nostr-protocol/nips/blob/master/65.md