Fixed scores duplicates

src/main/java/eu/mhsl/minenet/minigames/score/FirstWinsScore.java

@@ -31,6 +31,7 @@ public class FirstWinsScore extends Score {
 
     @Override
     public void addResult(Player p) {
+        if(scores.contains(p)) return;
         scores.add(p);
 
         new TitleMessage(Duration.ofMillis(1000), Duration.ofSeconds(1)).appendTranslated("score#finish").send(p);