fix(content_management): trigger headlines load when breaking news toggle changes

- Add condition to check for changes in isBreaking state
- Ensure headlines are reloaded when the breaking news toggle is switched

Author: fulleni

lib/content_management/view/content_management_page.dart

@@ -78,7 +78,8 @@ class _ContentManagementPageState extends State<ContentManagementPage>
               !const DeepCollectionEquality().equals(
                 previous.selectedCountryIds,
                 current.selectedCountryIds,
-              ),
+              ) ||
+              previous.isBreaking != current.isBreaking,
           listener: (context, state) {
             context.read<ContentManagementBloc>().add(
               LoadHeadlinesRequested(