Change emoji in About dialog to be a divider (#66409)

packages/flutter/lib/src/material/about.dart

@@ -18,6 +18,7 @@ import 'card.dart';
 import 'constants.dart';
 import 'debug.dart';
 import 'dialog.dart';
+import 'divider.dart';
 import 'floating_action_button.dart';
 import 'floating_action_button_location.dart';
 import 'ink_decoration.dart';
@@ -856,11 +857,8 @@ class _PackageLicensePageState extends State<_PackageLicensePage> {
       }
       setState(() {
         _licenses.add(const Padding(
-          padding: EdgeInsets.symmetric(vertical: 18.0),
-          child: Text(
-            '🍀‬', // That's U+1F340. Could also use U+2766 (❦) if U+1F340 doesn't work everywhere.
-            textAlign: TextAlign.center,
-          ),
+          padding: EdgeInsets.all(18.0),
+          child: Divider(),
         ));
         for (final LicenseParagraph paragraph in paragraphs) {
           if (paragraph.indent == LicenseParagraph.centeredIndent) {