chore: updated at_onboarding_flutter dependency

packages/at_theme_flutter/example/pubspec.yaml

@@ -32,20 +32,13 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   at_common_flutter: ^2.0.12
-  at_onboarding_flutter: ^6.1.3
+  at_onboarding_flutter: ^6.1.7
   at_theme_flutter:
     path: ../
   cupertino_icons: ^1.0.6
   flutter:
     sdk: flutter
 
-dependency_overrides:
-  at_onboarding_flutter:
-    git:
-      url: https://github.com/atsign-foundation/at_widgets.git
-      path: packages/at_onboarding_flutter
-      ref: fix/onboarding_deps_and_pub_points
-
 dev_dependencies:
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is