Apply new rector rules regarding to PHP version to 8.4

src/Bundle/ChillBudgetBundle/migrations/Version20230328155010.php

@@ -16,6 +16,7 @@ use Doctrine\Migrations\AbstractMigration;
 
 final class Version20230328155010 extends AbstractMigration
 {
+    #[\Override]
     public function getDescription(): string
     {
         return 'budget elements: restore the previous type to resource/charge kind if applicable';
@@ -48,6 +49,7 @@ final class Version20230328155010 extends AbstractMigration
         SQL);
     }
 
+    #[\Override]
     public function down(Schema $schema): void
     {
         $this->addSql("UPDATE chill_budget.resource_type SET kind=md5(random()::text) WHERE kind = ''");