FIX [migration][absence] fix the typing in db for absence datetime immuatable

src/Bundle/ChillMainBundle/Entity/User.php

@@ -42,7 +42,7 @@ class User implements AdvancedUserInterface
     protected ?int $id = null;
 
     /**
-     * @ORM\Column(type="datetime", nullable=true)
+     * @ORM\Column(type="datetime_immutable", nullable=true)
      */
     private ?DateTimeImmutable $absenceStart = null;