Update article.md

Author: lex111

1-js/99-js-misc/01-proxy/article.md

@@ -662,7 +662,7 @@ In most cases we can do the same without `Reflect`, for instance, reading a prop
 
 ### Proxying a getter
 
-Let's see an example that demonstrates why `Reflect.get` is better. And we'll also see why `get/set` have the fourth argument `receiver`, that we didn't use before.
+Let's see an example that demonstrates why `Reflect.get` is better. And we'll also see why `get/set` have the third argument `receiver`, that we didn't use before.
 
 We have an object `user` with `_name` property and a getter for it.