doc: fixing minor typo in AtExit hooks section

PR-URL: #7485
Reviewed-By: Brian White <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>

Author: danbev

doc/api/addons.md

@@ -1003,7 +1003,7 @@ console.log(result); // 30
 ### AtExit hooks
 
 An "AtExit" hook is a function that is invoked after the Node.js event loop
-has ended by before the JavaScript VM is terminated and Node.js shuts down.
+has ended but before the JavaScript VM is terminated and Node.js shuts down.
 "AtExit" hooks are registered using the `node::AtExit` API.
 
 #### void AtExit(callback, args)