README.md instructions have empty dedupe UI with test data

[rjurney]

The instructions at https://github.com/opensanctions/nomenklatura/blob/main/README.md don't result in any match candidates when using the suggested file https://github.com/opensanctions/nomenklatura/blob/main/tests/fixtures/donations.ijson in the README in step 2 nomenklatura dedupe -r resolver.json entites.ijson.

[saxomoose]

I ran through this today and am indeed getting duplicate candidates to resolve.

My commands:

1. nomenklatura xref -r resolver.json donations.ijson: generates resolver.json
2. nomenklatura dedupe -r resolver.json donations.ijson: opens interactive terminal

I believe the issue might be coming from you running the second command against entities.ijson and not donations.ijson.