Improve ranking algo in algolia

[B4nan]

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Issue description

We have a lot of hits from the API docs, and they often get better ranking over our own guides/examples (which usually have much higher value for users). We should also skip the index pages from API docs completely.

https://apify.slack.com/archives/C03BHBQNNG3/p1753696720560099

Code sample

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Node.js version

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I have tested this on the next release

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