Fix template for the driver test file created by 'flutter create' (#13472)

packages/flutter_tools/templates/driver/main_test.dart.tmpl

@@ -32,7 +32,7 @@ void main() {
       await driver.tap(fab);
 
       // Wait for text to change to the desired value
-      await driver.waitFor(find.text('Button tapped 1 time.'));
+      await driver.waitFor(find.text('1'));
     });
   });
 }