Fix cupertino icons mapping which was misaligned by 1 (#72384)

dev/integration_tests/flutter_gallery/test/demo/cupertino/cupertino_navigation_demo_test.dart

@@ -37,7 +37,5 @@ void main() {
       find.byType(CupertinoNavigationDemo),
       matchesGoldenFile('cupertino_navigation_demo.screen.2.png'),
     );
-  },
-  // TODO(egarciad): https://github.com/flutter/flutter/issues/69994
-  skip: true);
+  });
 }