fix #25

Author: Elic0de

src/main/java/com/github/elic0de/thejpspit/game/Game.java

@@ -97,15 +97,15 @@ public void death(PitPlayer player) {
             if (preferences.isDeathMessage()) {
                 player.sendMessage("&c【PIT】%player%に倒されました(KDレート:%rating%)"
                     .replaceAll("%player%", killer.getName())
-                    .replaceAll("%rating%", killer.getRating())
+                    .replaceAll("%rating%", killer.getRating().toString())
                 );
             }
         });
         killer.getPreferences().ifPresent(preferences -> {
             if (preferences.isKillMessage()) {
                 killer.sendMessage("&b【PIT】%player%を倒しました(KDレート:%rating%)"
                     .replaceAll("%player%", player.getName())
-                    .replaceAll("%rating%", player.getRating())
+                    .replaceAll("%rating%", player.getRating().toString())
                 );
             }
         });