fix: open source link not opening on mobile

lib/game/components/backbox/displays/game_over_info_display.dart

@@ -290,7 +290,7 @@ class OpenSourceTextComponent extends TextComponent with HasGameRef, Tappable {
         );
 
   @override
-  bool onTapDown(TapDownInfo info) {
+  bool onTapUp(TapUpInfo info) {
     openLink(ShareRepository.openSourceCode);
     return true;
   }

test/game/components/backbox/displays/game_over_info_display_test.dart

@@ -176,7 +176,7 @@ void main() {
 
         final openSourceLink =
             component.descendants().whereType<OpenSourceTextComponent>().first;
-        openSourceLink.onTapDown(_MockTapDownInfo());
+        openSourceLink.onTapUp(_MockTapUpInfo());
 
         await game.ready();