Fix typo

Author: sparkofreason

1-js/07-object-properties/02-property-accessors/article.md

@@ -85,7 +85,7 @@ alert(user.surname); // Cooper
 Now we have a "virtual" property. It is readable and writable, but in fact does not exist.
 
 ```smart header="Accessor properties are only accessible with get/set"
-Once a property is defined with `get prop()` or `set prop()`, it's an accessor property, not a data properety any more.
+Once a property is defined with `get prop()` or `set prop()`, it's an accessor property, not a data property any more.
 
 - If there's a getter -- we can read `object.prop`, otherwise we can't.
 - If there's a setter -- we can set `object.prop=...`, otherwise we can't.