style: better conforms to style guide

Author: kfc35

release-content/release-notes/automatic_directional_navigation.md

@@ -29,7 +29,15 @@ commands.spawn((
 ));
 ```
 
-To leverage automatic navigation, use the `AutoDirectionalNavigator` system parameter instead of the `DirectionalNavigation` system parameter.
+To leverage automatic navigation, use the `AutoDirectionalNavigator` system parameter instead of the `DirectionalNavigation` system parameter:
+
+```rust
+fn my_navigation_system(mut auto_directional_navigator: AutoDirectionalNavigator) {
+    // ...
+    auto_directional_navigator.navigate(CompassOctant::East);
+    // ...
+}
+```
 
 That's it! The `DirectionalNavigationPlugin` will set up the resources that `AutoDirectionalNavigator` uses to function.