[Bolt 5] Documentation for global search contains reference to non-existent variable

See https://docs.boltcms.io/5.0/templating/content-search#global-search

The example use case:

`{% if records|length == 0 %}

{{ searchresult.no_of_results }} results for {{ searchTerm }} found.

results in the runtime error

`Variable "searchresult" does not exist.`

I guess the variable name has not been updated from a previous version of Bolt CMS, but I don't know what it should be.