minor #21469 [HttpFoundation] Remove deprecated Request::get() in favor of using properties (alamirault)

This PR was merged into the 7.4 branch.

Discussion
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[HttpFoundation] Remove deprecated Request::get() in favor of using properties

Fix #21463

`Request::get()` was not documented, so I think there is no deprecation directive to add ?

Commits
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5ef15b7 [HttpFoundation] Remove deprecated Request::get() in favor of using properties

Author: javiereguiluz

components/http_kernel.rst

@@ -639,7 +639,7 @@ else that can be used to create a working example::
     $routes->add('hello', new Route('/hello/{name}', [
         '_controller' => function (Request $request): Response {
             return new Response(
-                sprintf("Hello %s", $request->get('name'))
+                sprintf("Hello %s", $request->attributes->get('name'))
             );
         }]
     ));