fix: dart format quantum_secure_page.dart

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: frnandu

packages/sample-app/lib/quantum_secure_page.dart

@@ -242,7 +242,9 @@ class _QuantumSecurePageState extends State<QuantumSecurePage> {
                         child: Text(
                           'This is an experiment to test the feasibility of Dilithium in Nostr.\n\n'
                           'Please note that the ID is still generated the conventional way.',
-                          style: Theme.of(context).textTheme.bodyMedium
+                          style: Theme.of(context)
+                              .textTheme
+                              .bodyMedium
                               ?.copyWith(color: Colors.grey[700], height: 1.5),
                         ),
                       ),