style(content_management): increase spacing between title and icon

- Change SizedBox width from AppSpacing.xs to AppSpacing.sm

Author: fulleni

lib/content_management/view/content_management_page.dart

@@ -183,7 +183,7 @@ class _ContentManagementPageState extends State<ContentManagementPage>
             children: [
               Text(l10n.contentManagement),
               const SizedBox(
-                width: AppSpacing.xs,
+                width: AppSpacing.sm,
               ), // Spacing between title and icon
               AboutIcon(
                 dialogTitle: l10n.contentManagement,