improve docs

Author: buenaflor

docs/platforms/flutter/configuration/releases.mdx

@@ -64,7 +64,7 @@ Monitor the [health of releases](/product/releases/health/) by observing user ad
 
 <Note>
 
-Crash reporting and app hang detection are not available for watchOS.
+Release health is only available for Android and iOS and macOS.
 
 </Note>
 

platform-includes/configuration/auto-session-tracking/flutter.mdx

@@ -1,29 +1,23 @@
 To benefit from the health data, you must use at least version 4.0.0 of the Flutter SDK.
 
-By default, the session is terminated once the application is in the background for more than 30 seconds. You can change the time out with the option named `sessionTrackingIntervalMillis`. It takes the amount in milliseconds. For example, to configure it to be 60 seconds:
+### Session Timeout
 
-```dart
-import 'package:flutter/widgets.dart';
-import 'package:sentry_flutter/sentry_flutter.dart';
+By default, the session is terminated once the application is in the background for more than `30 seconds`. You can change the default timeout with the option `autoSessionTrackingInterval` to a Duration of your choosing.
 
-Future<void> main() async {
-  await SentryFlutter.init(
-    (options) => options.autoSessionTrackingInterval = const Duration(milliseconds: 60000)
-    appRunner: () => runApp(MyApp()),
-  );
-}
+```dart
+SentryFlutter.init((options) {
+  // Change timeout duration until session is terminated in background
+  options.autoSessionTrackingInterval = const Duration(seconds: 60)
+}, appRunner: () => runApp(MyApp()));
 ```
 
-If you'd like to opt out of this feature, you can do so using options.
+### Disable Auto Session Tracking
 
-```dart
-import 'package:flutter/widgets.dart';
-import 'package:sentry_flutter/sentry_flutter.dart';
+If you'd like to opt out of capturing sessions, set the option `enableAutoSessionTracking` to `false`.
 
-Future<void> main() async {
-  await SentryFlutter.init(
-    (options) => options.enableAutoSessionTracking = true, // it's enabled by default
-    appRunner: () => runApp(MyApp()),
-  );
-}
+```dart
+SentryFlutter.init((options) {
+  // Disable auto session tracking
+  options.enableAutoSessionTracking = false;
+}, appRunner: () => runApp(MyApp()));
 ```