doc: fix typo in deprecations

Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
PR-URL: nodejs#63434
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>

Author: watilde

doc/api/deprecations.md

@@ -802,7 +802,7 @@ changes:
 Type: Revoked
 
 The [`events.listenerCount(emitter, eventName)`][] API was deprecated, as it
-provided identical fuctionality to [`emitter.listenerCount(eventName)`][]. The
+provided identical functionality to [`emitter.listenerCount(eventName)`][]. The
 deprecation was revoked because this function has been repurposed to also
 accept {EventTarget} arguments.