fix(content_management): update topic edit functionality

- Replace TopicUpdated event with LoadTopicsRequested event after successful topic update
- Ensure topic list is refreshed to reflect changes

Author: fulleni

lib/content_management/view/edit_topic_page.dart

@@ -108,7 +108,7 @@ class _EditTopicViewState extends State<_EditTopicView> {
                 SnackBar(content: Text(l10n.topicUpdatedSuccessfully)),
               );
             context.read<ContentManagementBloc>().add(
-              TopicUpdated(state.updatedTopic!),
+              const LoadTopicsRequested(limit: kDefaultRowsPerPage),
             );
             context.pop();
           }