wrong SQL CREATE INDEX in readme

[remote4me]

Environment: Ubuntu 22.04, Self-hosted Postgresml installed in Postgresql 13 database

I am following instructions here (under "Vector Database", "Step 2: Indexing your embeddings using different algorithms"):
https://github.com/postgresml/postgresml?tab=readme-ov-file#vector-database

This SQL returns error:

CREATE INDEX ON tweet_embeddings USING ivfflat (embedding vector_cosine_ops);

ERROR: operator class "vector_cosine_ops" does not accept data type real[]
1 statement failed.