Deprecated function: Creation of dynamic property (till php 8.2)

Problem/Motivation

Error

Error message
Deprecated function: Creation of dynamic property Drupal\entity_relationship_diagram\Form\EntityRelationshipForm::$entityTypeManager is deprecated in Drupal\entity_relationship_diagram\Form\EntityRelationshipForm->__construct() (line 36 of modules/contrib/entity_relationship_diagram/src/Form/EntityRelationshipForm.php).

Steps to reproduce

Goto '/admin/reports/entity-relationship-diagram'
Got error.

Proposed resolution

Update deprecated function.