Fix typo (#45125)

Typo in a title in a gallery demo
diff --git a/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart b/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
index 8c5a5d8..1acc2ee 100644
--- a/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
+++ b/examples/flutter_gallery/lib/demo/transformations/transformations_demo.dart
@@ -40,7 +40,7 @@
     // the GestureTransformable parent widget.
     return Scaffold(
       appBar: AppBar(
-        title: const Text('2D Tranformations'),
+        title: const Text('2D Transformations'),
         actions: <Widget>[
           IconButton(
             icon: const Icon(Icons.help),