Update 4354-sticky-events.md

proposals/4354-sticky-events.md

@@ -38,7 +38,8 @@ Message events can be annotated with a new top-level `sticky` key[^toplevel], wh
 which is the number of milliseconds for the event to be sticky. The presence of `sticky.duration_ms`
 with a valid value makes the event “sticky”[^stickyobj]. Valid values are the integer range 0-3600000 (1 hour).
 For use cases that require stickiness beyond this limit, the application is responsible for sending another
-event to make it happen.
+event to make it happen. The `sticky` key is not protected from redaction. A redacted sticky event is the same
+as a normal event.
 
 ```json
 {