Fix typo that is introduced in hotfix 2.5.x (#92745)

packages/flutter/test/material/text_field_test.dart

@@ -1524,7 +1524,7 @@ void main() {
     expect(container.size, Size.zero);
   }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.android, TargetPlatform.fuchsia, TargetPlatform.linux, TargetPlatform.windows }));
 
-  testWidgets('Sawping controllers should update selection', (WidgetTester tester) async {
+  testWidgets('Swapping controllers should update selection', (WidgetTester tester) async {
     TextEditingController controller = TextEditingController(text: 'readonly');
     final OverlayEntry entry = OverlayEntry(
       builder: (BuildContext context) {