update flutter_local_notifications

[atavism]

CI Android builds were failing because of the following:

/Users/runner/.pub-cache/hosted/pub.dev/flutter_local_notifications-17.1.2/android/src/main/java/com/dexterous/flutterlocalnotifications/FlutterLocalNotificationsPlugin.java:1033: error: reference to bigLargeIcon is ambiguous
> Task :flutter_local_notifications:compileSideloadJavaWithJavac FAILED
      bigPictureStyle.bigLargeIcon(null);
                     ^
  both method bigLargeIcon(Bitmap) in BigPictureStyle and method bigLargeIcon(Icon) in BigPictureStyle match
1 error

Using the latest version of flutter_local_notifications resolves the issue