fix: update const for event & bloc

test/game/bloc/start_game_bloc_test.dart

@@ -27,7 +27,7 @@ void main() {
       build: () => StartGameBloc(
         game: pinballGame,
       ),
-      act: (bloc) => bloc.add(SelectCharacter()),
+      act: (bloc) => bloc.add(const SelectCharacter()),
       expect: () => [
         const StartGameState(
           status: StartGameStatus.selectCharacter,
@@ -40,7 +40,7 @@ void main() {
       build: () => StartGameBloc(
         game: pinballGame,
       ),
-      act: (bloc) => bloc.add(HowToPlay()),
+      act: (bloc) => bloc.add(const HowToPlay()),
       expect: () => [
         const StartGameState(
           status: StartGameStatus.howToPlay,
@@ -53,7 +53,7 @@ void main() {
       build: () => StartGameBloc(
         game: pinballGame,
       ),
-      act: (bloc) => bloc.add(Play()),
+      act: (bloc) => bloc.add(const Play()),
       expect: () => [
         const StartGameState(
           status: StartGameStatus.play,

test/game/bloc/start_game_event_test.dart

@@ -5,22 +5,22 @@ void main() {
   group('StartGameEvent', () {
     test('SelectCharacter supports value equality', () {
       expect(
-        SelectCharacter(),
-        equals(SelectCharacter()),
+        const SelectCharacter(),
+        equals(const SelectCharacter()),
       );
     });
 
     test('HowToPlay supports value equality', () {
       expect(
-        HowToPlay(),
-        equals(HowToPlay()),
+        const HowToPlay(),
+        equals(const HowToPlay()),
       );
     });
 
     test('Play supports value equality', () {
       expect(
-        Play(),
-        equals(Play()),
+        const Play(),
+        equals(const Play()),
       );
     });
   });