refactor: renamed test

test/game/pinball_game_test.dart

@@ -18,21 +18,19 @@ void main() {
       () {
         bool Function(Component) componentSelector<T>() =>
             (component) => component is T;
- 
-        group('FlipperGroup', () {
-          flameTester.test(
-            'has only one right Flipper',
-            (game) async {
-              await game.ready();
-              expect(
-                () => game.children.singleWhere(
-                  componentSelector<FlipperGroup>(),
-                ),
-                returnsNormally,
-              );
-            },
-          );
-        });
+
+        flameTester.test(
+          'has only one FlipperGroup',
+          (game) async {
+            await game.ready();
+            expect(
+              () => game.children.singleWhere(
+                componentSelector<FlipperGroup>(),
+              ),
+              returnsNormally,
+            );
+          },
+        );
       },
     );
   });