Fix English typo

Author: ekqvist

1-js/08-prototypes/05-getting-all-properties/article.md

@@ -48,7 +48,7 @@ for(let prop in rabbit) alert(prop); // jumps, then eats
 */!*
 ```
 
-If that's no what we want, and we'd like to exclude inherited properties, there's a built-in method [obj.hasOwnProperty(key)](mdn:js/Object/hasOwnProperty): it returns `true` if `obj` has its own (not inherited) property named `key`.
+If that's not what we want, and we'd like to exclude inherited properties, there's a built-in method [obj.hasOwnProperty(key)](mdn:js/Object/hasOwnProperty): it returns `true` if `obj` has its own (not inherited) property named `key`.
 
 So we can filter out inherited properties (or do something else with them):