Incorrect behavior of StrictArrayParamDimFetchRector on default value string type

[samsonasik]

Bug Report

Subject	Details
Rector version	last dev-main
Installed as	composer dependency

Minimal PHP Code Causing Issue

See https://getrector.com/demo/939b4537-6cd7-4b8d-80cb-6719b52d1280

<?php

final class DemoFile
{
    public function run($param = 'foo')
    {
	 if (isset($param['bar'])) {
            echo $param['bar'];
        }
        
        echo $param;
    }
}

Responsible rules

• StrictArrayParamDimFetchRector

Expected Behavior

Should be skipped or make it array|string