bug with sparse vector index creation

[louisLT]

Bug Description
On docker image 0.7.3
The simple example given in the documentation for creating a sparse vector index produces an error.

How To Reproduce

CREATE TABLE items (id bigserial PRIMARY KEY, embedding sparsevec(5));
INSERT INTO items (embedding) VALUES ('{1:1,3:2,5:3}/5'), ('{1:4,3:5,5:6}/5');
CREATE INDEX ON items USING hnsw (embedding vector_l2_ops);

=> SQL Error [42804]: ERROR: operator class "vector_l2_ops" does not accept data type sparsevec

[rebasedming]

Woops, this is an issue with the documentation. The correct distance function for sparse vectors should be sparsevec_l2_ops.