fix: rename shadowed variable in Request::getType()

The parameter \$type was being reassigned to the session value, which
shadows the original parameter and causes confusion for static analysis
tools and maintainers.

Renamed the session value variable to \$value for clarity.

src/Laravel/Http/Request.php

@@ -56,14 +56,14 @@ final readonly class Request implements RequestInterface
     {
         $session = $this->getSession();
 
-        /** @var false|string|string[] $type */
-        $type = $session?->get($type);
+        /** @var false|string|string[] $value */
+        $value = $session?->get($type);
 
-        if (!\is_string($type) && !\is_array($type)) {
+        if (!\is_string($value) && !\is_array($value)) {
             return [];
         }
 
-        return $type;
+        return $value;
     }
 
     public function forgetType(string $type): void