Update the Flutter SDK initialization snippet

Author: eandreeva-twr

versioned_docs/version-3.0/ios-present-onboardings.md

@@ -121,7 +121,7 @@ AdaptyOnboardingView(
 ## Customize how links open in onboardings
 
 :::important
-Customizing how links open in onboardings is supported starting from Adapty SDK v. 3.15.1.
+Customizing how links open in onboardings is supported starting from Adapty SDK v.3.15.1.
 :::
 
 By default, links in onboardings open in an in-app browser. This provides a seamless user experience by displaying web pages within your application, allowing users to view them without switching apps.

versioned_docs/version-3.0/sdk-installation-flutter.md

@@ -64,16 +64,37 @@ The Adapty SDK only needs to be activated once in your app.
 ```dart showLineNumbers title="main.dart"
 import 'package:adapty_flutter/adapty_flutter.dart';
 
-void main() async {
-  WidgetsFlutterBinding.ensureInitialized();
-  
-  // Configure and activate Adapty SDK
-  await Adapty().activate(
-    configuration: AdaptyConfiguration(apiKey: 'YOUR_PUBLIC_SDK_KEY')
-  );
-  
+void main() {
   runApp(MyApp());
 }
+
+class MyApp extends StatefulWidget {
+  @override
+  _MyAppState createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  @override
+  void initState() {
+    _initializeAdapty();
+
+    super.initState();
+  }
+
+  Future<void> _initializeAdapty() async {
+    try {
+      await Adapty().activate(
+        configuration: AdaptyConfiguration(apiKey: 'YOUR_PUBLIC_SDK_KEY'),
+      );
+    } catch (e) {
+      // handle the error
+    }
+  }
+
+  Widget build(BuildContext context) {
+    return Text("Hello");
+  }
+}
 ```
 
 <GetKey />