minor #21007 [Uid] Update uid.rst (curenect-meiner)

This PR was submitted for the 7.2 branch but it was merged into the 6.4 branch instead.

Discussion
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[Uid] Update uid.rst

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Commits
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a94507c Update uid.rst

Author: javiereguiluz

components/uid.rst

@@ -331,6 +331,7 @@ entity primary keys::
     namespace App\Entity;
 
     use Doctrine\ORM\Mapping as ORM;
+    use Symfony\Bridge\Doctrine\IdGenerator\UuidGenerator;
     use Symfony\Bridge\Doctrine\Types\UuidType;
     use Symfony\Component\Uid\Uuid;
 
@@ -339,7 +340,7 @@ entity primary keys::
         #[ORM\Id]
         #[ORM\Column(type: UuidType::NAME, unique: true)]
         #[ORM\GeneratedValue(strategy: 'CUSTOM')]
-        #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
+        #[ORM\CustomIdGenerator(class: UuidGenerator::class)]
         private ?Uuid $id;
 
         public function getId(): ?Uuid