minor #20997 [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

with the string their is almost a failure, cause symfony dont find the class. This prevents it form it.

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Commits
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881051c Update uid.rst

Author: javiereguiluz

components/uid.rst

@@ -527,6 +527,7 @@ entity primary keys::
     namespace App\Entity;
 
     use Doctrine\ORM\Mapping as ORM;
+    use Symfony\Bridge\Doctrine\IdGenerator\UlidGenerator;
     use Symfony\Bridge\Doctrine\Types\UlidType;
     use Symfony\Component\Uid\Ulid;
 
@@ -535,7 +536,7 @@ entity primary keys::
         #[ORM\Id]
         #[ORM\Column(type: UlidType::NAME, unique: true)]
         #[ORM\GeneratedValue(strategy: 'CUSTOM')]
-        #[ORM\CustomIdGenerator(class: 'doctrine.ulid_generator')]
+        #[ORM\CustomIdGenerator(class: UlidGenerator::class)]
         private ?Ulid $id;
 
         public function getId(): ?Ulid