Events added by add_state_scoped_event are spawned before State is entered

## Bevy version

0.16.0-dev

## What you did

```rust
pub enum GameState {
#[default]
Loading,
InGame,
}

struct TesterEventDoNotSendWhileLoading;

fn main() {
App::new()
.add_plugins(DefaultPlugins)
.init_state::()
.add_state_scoped_event::(GameState::InGame)
.add_systems(
Update,
(
transition.run_if(on_timer(Duration::from_secs(2))),
send_event.run_if(on_timer(Duration::from_secs(1))),
read_event,
),
)
.run();
}

fn transition(mut state: ResMut>) {
state.set(GameState::InGame);
}

fn send_event(mut event_writer: EventWriter) {
event_writer.write(TesterEventDoNotSendWhileLoading);
}

fn read_event(mut event_reader: EventReader, state: Res>) {
event_reader.read().for_each(|_| {
println!("Event fired in state {:?}", state.get());
})
}
```

## What went wrong
The first time read_event runs it prints out `Event fired in state Loading`.