Reopen #1740 Fix dialog text (#1931)

material_3_demo/lib/component_screen.dart

@@ -733,11 +733,11 @@ class _DialogsState extends State<Dialogs> {
             'A dialog is a type of modal window that appears in front of app content to provide critical information, or prompt for a decision to be made.'),
         actions: <Widget>[
           TextButton(
-            child: const Text('Okay'),
+            child: const Text('Dismiss'),
             onPressed: () => Navigator.of(context).pop(),
           ),
           FilledButton(
-            child: const Text('Dismiss'),
+            child: const Text('Okay'),
             onPressed: () => Navigator.of(context).pop(),
           ),
         ],