Fix invalid @static method signature

Author: tvdijen

src/Assert.php

@@ -44,7 +44,7 @@
  * @method static void boolean(mixed $value, string $message = '', string $exception = '')
  * @method static void scalar(mixed $value, string $message = '', string $exception = '')
  * @method static void object(mixed $value, string $message = '', string $exception = '')
- * @method static void resource(mixed $value, string|null $type, string $message = '', string $exception = '')
+ * @method static void resource(mixed $value, string|null $type = null, string $message = '', string $exception = '')
  * @method static void isCallable(mixed $value, string $message = '', string $exception = '')
  * @method static void isArray(mixed $value, string $message = '', string $exception = '')
  * @method static void isTraversable(mixed $value, string $message = '', string $exception = '')
@@ -149,8 +149,8 @@
  * @method static void allScalar(mixed $value, string $message = '', string $exception = '')
  * @method static void nullOrObject(mixed $value, string $message = '', string $exception = '')
  * @method static void allObject(mixed $value, string $message = '', string $exception = '')
- * @method static void nullOrResource(mixed $value, string|null $type, string $message = '', string $exception = '')
- * @method static void allResource(mixed $value, string|null $type, string $message = '', string $exception = '')
+ * @method static void nullOrResource(mixed $value, string|null $type = null, string $message = '', string $exception = '')
+ * @method static void allResource(mixed $value, string|null $type = null, string $message = '', string $exception = '')
  * @method static void nullOrIsCallable(mixed $value, string $message = '', string $exception = '')
  * @method static void allIsCallable(mixed $value, string $message = '', string $exception = '')
  * @method static void nullOrIsArray(mixed $value, string $message = '', string $exception = '')