fix: breaking change for pgvecto_rs

[silver-ymz]

Benchmark results in aws r6a.xlarge (4 vCPU, 32 GB) for reference

pgvector_rust_HNSW_single_node_laion-768-5m-ip:

num	precisions	rps
1	93.64%	764.39
2	88.39%	405.74
3	93.75%	763.15
4	88.49%	434.92

pgvector_rust_HNSW_single_node_laion-768-5m-probability-ip:

num	precisions	rps
1	93.07%	95.46
2	89.57%	511.88
3	94.49%	10.70
4	93.10%	86.78
5	93.13%	94.83
6	89.68%	500.15
7	94.46%	10.38
8	93.18%	85.12