minor #21243 Update rate_limiter.rst (keune)

This PR was merged into the 7.3 branch.

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Update rate_limiter.rst

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2bc78c1 Update rate_limiter.rst

Author: javiereguiluz

rate_limiter.rst

@@ -646,7 +646,7 @@ Then, inject and use as normal::
     use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\HttpFoundation\Response;
-    use Symfony\Component\RateLimiter\RateLimiterFactory;
+    use Symfony\Component\RateLimiter\RateLimiterFactoryInterface;
 
     class ContactController extends AbstractController
     {