enhance(algolia): ranking tweaks

[marcelgerber]

Part of #3330.

See also: Notion.

[marcelgerber]

At this point in time, and at commit df294d0, the benchmark reports:

{
  "name": "synthetic-queries-2024-03-25.json",
  "scope": "articles",
  "scores": {
    "precision@2": 0.364,
    "precision@4": 0.276
  },
  "numQueries": 4260,
  "algoliaApp": "74GKBOIDJQ",
  "algoliaIndex": "algolia-ranking-tweaks-pages"
}

So, about a 3% increase in p@2, and a 2% increase in p@4 in comparison to #3400 (comment). Not too bad.