Related posts advice uses deprecated function

[rmccue]

The advice under the "related posts" configuration at https://docs.altis-dxp.com/search/configuration/#related-posts is out-of-date; it recommends ep_find_related() which is deprecated. https://10up.github.io/ElasticPress/tutorial-features.html recommends using\ElasticPress\Features::factory()->get_registered_feature( 'related_posts' )->find_related( $post_id, $return = 5 ) directly now.

As an aside, it's also in an obscure place; I had to search to find the information on related posts at all. I'd suggest breaking it to a new page under "Querying"