small fix, don't worry about it

lifetimer/lib/features/settings/presentation/about_challenge_screen.dart

@@ -202,13 +202,14 @@ class AboutChallengeScreen extends StatelessWidget {
 
   Future<void> _openLink(BuildContext context, String url) async {
     final uri = Uri.parse(url);
+    final scaffoldMessenger = ScaffoldMessenger.of(context);
     final launched = await launchUrl(
       uri,
       mode: LaunchMode.externalApplication,
     );
 
     if (!launched) {
-      ScaffoldMessenger.of(context).showSnackBar(
+      scaffoldMessenger.showSnackBar(
         const SnackBar(content: Text('Could not open link')),
       );
     }