Fixing Minor Sentence Structure Mistake in Events Example Docs (#20217)

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

Author: Carter0

examples/ecs/event.rs

@@ -1,5 +1,5 @@
-//! This example shows how to send, mutate, and receive, events. As well as showing
-//! how to you might control system ordering so that events are processed in a specific order.
+//! This example shows how to send, mutate, and receive, events. It also demonstrates
+//! how to control system ordering so that events are processed in a specific order.
 //! It does this by simulating a damage over time effect that you might find in a game.
 
 use bevy::prelude::*;