rephrase is_empty docs

crates/bevy_ecs/src/event.rs

@@ -284,7 +284,7 @@ impl<'w, 's, T: Resource> EventReader<'w, 's, T> {
         self.events.event_reader_len(self.last_event_count.0)
     }
 
-    /// Determines if there are any events available to be read without consuming any.
+    /// Determines if no events are available to be read without consuming any.
     /// If you need to consume the iterator you can use [`EventReader::any`]
     /// WARNING: `events.is_empty()` is not the same as doing `!events.any()`
     pub fn is_empty(&self) -> bool {