KMeansLocalTests.testComputeNeighbours: <0.48484848484848486> was less than <0.5>

[GalLalouche]

CI Link

https://buildkite.com/elastic/elasticsearch-pull-request/builds/104072#019a7eb4-b2bd-47d8-905f-3ccce31f1068

Repro line

./gradlew ":server:test" --tests "org.elasticsearch.index.codec.vectors.cluster.KMeansLocalTests.testComputeNeighbours" -Dtests.seed=D2EB53975AD75395 -Dtests.locale=csw-Cans-CA -Dtests.timezone=Africa/Kinshasa -Druntime.java=25

Does it reproduce?

Yes

Applicable branches

main

Failure history

https://buildkite.com/elastic/elasticsearch-pull-request/builds/104072#019a7eb4-b2bd-47d8-905f-3ccce31f1068

Failure excerpt

Encountered in #138023, but fails in main as well.
@iverase, looks you added this test, so I assigned it to you 😃.

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)