Update utils.md

Author: Aylur

src/content/docs/config/utils.md

@@ -1,4 +1,4 @@
----
+/---
 title: Utils
 description: Utility functions
 ---
@@ -201,7 +201,7 @@ when the widget is destroyed
 
 ```js
 const widget = Widget.Label()
-const id = Utils.interval(1000, () => {}, label)
+const id = Utils.interval(1000, () => {}, widget)
 widget.destroy()
 ```