Update star route.

src/Controller/StarController.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Krzysiej\RyobiCrawler\Controller;
+
+use Krzysiej\RyobiCrawler\Models\Product;
+
+final class StarController extends BaseController
+{
+    public function __invoke(int $productId): void
+    {
+        Product::find($productId)->toggleStarred()->save();
+        header('Location: ' . $_SERVER['HTTP_REFERER']);
+    }
+}