:memo: Fix typos

[ci skip]

docs/api/screen.md

@@ -1,7 +1,7 @@
 # screen
 
 The `screen` module retrieves information about screen size, displays, cursor
-position, etc. You cannot not use this module until the `ready` event of the
+position, etc. You can not use this module until the `ready` event of the
 `app` module is emitted (by invoking or requiring it).
 
 `screen` is an [EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).