Update form-data.md

According to https://github.com/symfony/http-foundation/blob/master/Request.php#L1429, `isMethodSafe` should be passed `false` as an argument.

Author: BPagoaga

core/form-data.md

@@ -40,7 +40,7 @@ final class DeserializeListener
 
     public function onKernelRequest(GetResponseEvent $event): void {
         $request = $event->getRequest();
-        if ($request->isMethodSafe() || $request->isMethod(Request::METHOD_DELETE)) {
+        if ($request->isMethodSafe(false) || $request->isMethod(Request::METHOD_DELETE)) {
             return;
         }
 
@@ -84,4 +84,4 @@ services:
         decorates: 'api_platform.listener.request.deserialize'
         arguments:
             $decorated: '@App\EventListener\DeserializeListener.inner'
-```
+```