minor symfony#48654 [DependencyInjection] Fix undefined class in test (chalasr)

This PR was merged into the 5.4 branch.

Discussion
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[DependencyInjection] Fix undefined class in test

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | symfony#42347 (comment)
| License       | MIT
| Doc PR        | -

Commits
-------

949c304 [DI] Fix undefined class in test

Author: chalasr

src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php

@@ -184,19 +184,19 @@ public function testIndexedByServiceIdWithDecoration()
 
         $container->setDefinition(Service::class, $service);
 
-        $decorated = new Definition(Decorated::class);
+        $decorated = new Definition(DecoratedService::class);
         $decorated->setPublic(true);
         $decorated->setDecoratedService(Service::class);
 
-        $container->setDefinition(Decorated::class, $decorated);
+        $container->setDefinition(DecoratedService::class, $decorated);
 
         $container->compile();
 
         /** @var ServiceLocator $locator */
         $locator = $container->get(Locator::class)->locator;
         static::assertTrue($locator->has(Service::class));
-        static::assertFalse($locator->has(Decorated::class));
-        static::assertInstanceOf(Decorated::class, $locator->get(Service::class));
+        static::assertFalse($locator->has(DecoratedService::class));
+        static::assertInstanceOf(DecoratedService::class, $locator->get(Service::class));
     }
 
     public function testDefinitionOrderIsTheSame()