Add note about third party widgets

Author: buenaflor

platform-includes/replay/privacy-configuration/dart.flutter.mdx

@@ -1,17 +1,7 @@
 Masking in the Sentry Flutter SDK is based on Widget _types_, e.g. `Image`, not the string representation of the type (i.e. we check whether
 a `widgetInstance` should be masked by checking `if (widgetInstance is Image)` instead of `if (widgetInstance.runtimeType == 'Image')`).
 This means we can ensure masking works regardless of obfuscation in release builds and also works for subclasses.
-However, it also means we can only automatically mask widgets that are part of the Flutter SDK itself.
-
-<Alert level="warning">
-We cannot mask widgets defined in various 3rd-party packages (because the type is not known in the Sentry Flutter SDK),
-even though many should be masked.
-
-Therefore, you need to consider the widgets your application uses and ensure they're masked correctly with custom masking rules.
-Examples of widgets that usually should be masked include (but are not limited to): VideoPlayer, WebView, Chart, FlutterMap etc.
-
-</Alert>
-
+This approach allows the SDK to automatically mask widgets that are part of the Flutter SDK itself. However, for third-party widgets, you need to manually configure the privacy settings to mask their content. Read more about [Third Party Widgets](#third-party-widgets) below.
 
 ## Privacy Configuration