Fix maximum_listing_select in config.yaml for Relation

[ionutlip]

A brief description of the issue goes here.

Details

Question	Answer
Relevant Bolt Version	5.1.1
Install type	Composer install
BC Break	yes/no
PHP version	8.0.14
Web server	Nginx
Database	Mysql 8
For UX/UI issues	Browser name and version

Reproduction

same problem as this one #2619 we need to change $this->config->get('maximum_listing_select', 1000); to $this->config->get('general/maximum_listing_select', 1000);

Bug summary

Specifics

Steps to reproduce

Expected result

Actual result