minor #33234 [Routing] Add a param annotation for $annot (derrabus)

This PR was merged into the 3.4 branch.

Discussion
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[Routing] Add a param annotation for $annot

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

This PR addresses https://github.com/symfony/symfony/pull/33191/files#r314998032

Commits
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5d26f4c72e [Routing] Add a param annotation for $annot.

src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php

@@ -15,6 +15,7 @@ use Doctrine\Common\Annotations\Reader;
 use Symfony\Component\Config\Loader\LoaderInterface;
 use Symfony\Component\Config\Loader\LoaderResolverInterface;
 use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\Routing\Annotation\Route as RouteAnnotation;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
@@ -129,6 +130,10 @@ abstract class AnnotationClassLoader implements LoaderInterface
         return $collection;
     }
 
+    /**
+     * @param RouteAnnotation $annot   or an object that exposes a similar interface
+     * @param array           $globals
+     */
     protected function addRoute(RouteCollection $collection, $annot, $globals, \ReflectionClass $class, \ReflectionMethod $method)
     {
         $name = $annot->getName();