[DependencyInjection] Fixed tests for wither with static return type.

Author: derrabus

Tests/Fixtures/WitherStaticReturnType.php

@@ -2,6 +2,8 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
 
+use Symfony\Component\DependencyInjection\Tests\Compiler\Foo;
+
 class WitherStaticReturnType
 {
     public $foo;

Tests/Fixtures/php/services_wither_staticreturntype.php

@@ -48,11 +48,11 @@ public function getRemovedIds(): array
     /**
      * Gets the public 'wither' shared autowired service.
      *
-     * @return \Symfony\Component\DependencyInjection\Tests\Compiler\WitherStaticReturnType
+     * @return \Symfony\Component\DependencyInjection\Tests\Fixtures\WitherStaticReturnType
      */
     protected function getWitherService()
     {
-        $instance = new \Symfony\Component\DependencyInjection\Tests\Compiler\WitherStaticReturnType();
+        $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\WitherStaticReturnType();
 
         $a = new \Symfony\Component\DependencyInjection\Tests\Compiler\Foo();