Fix docs typo

Signed-off-by: Alex Saveau <[email protected]>

src/event/epoll.rs

@@ -102,7 +102,7 @@ pub fn create(flags: CreateFlags) -> io::Result<OwnedFd> {
 /// `epoll_ctl(self, EPOLL_CTL_ADD, data, event)`—Adds an element to an epoll
 /// object.
 ///
-/// This registers interest in any of the events set in `events` occurring on
+/// This registers interest in any of the events set in `event_flags` occurring on
 /// the file descriptor associated with `data`.
 ///
 /// Note that `close`ing a file descriptor does not necessarily unregister interest