Wrong @params for RankMath\Metadata constructor

Hey again,

Getting phpstan errors when using RankMath\Metadata types in my plugin.

The issue is because both protected $object, and public function __construct( $object ), are looking for RankMath\WP_Post|RankMath\WP_User|...

To refer to the actual WP_ objects, they need to be slashed:

e.g.
`php
/**
* Holds the object.
*
* @var \WP_Post|\WP_Term|\WP_User
*/
protected $object = null;
`

and
`php
/**
* Constructor.
*
* @param \WP_Post|\WP_Term|\WP_User $object Current object.
*/
public function __construct( $object ) {
$this->object = $object;
}

Best,

David