[PHP-WEBMASTER] [web-php] PR #1139: releases/8.4: Make minor codestyle changes to array_find example

[TimWolla]

Pull Request: https://github.com/php/web-php/pull/1139
Author: TimWolla

This syncs the array function syntax in the array_find example with the one in 
the PDO subclasses example by adding the space between the `fn` and `(`.