Fix typo (v9)

Author: kantuni

pages/docs/manual/v9.0.0/bind-to-js-function.mdx

@@ -84,7 +84,7 @@ MyGame.draw(10, 20, undefined);
 
 ## Object Method
 
-Functions attached to a JS objects (other than JS modules) require a special way of binding to them, using `send`:
+Functions attached to JS objects (other than JS modules) require a special way of binding to them, using `send`:
 
 <CodeTab labels={["ReScript", "JS Output"]}>