Fix: typo in comment

distributed-key-generation/src/main/java/meerkat/crypto/dkg/feldman/User.java

@@ -436,7 +436,7 @@ public class User<T> implements Runnable {
     /**
      * complaint message is valid if:
      *  1. it was received in broadcast chanel
-     *  2. the sender didn't complained against id before
+     *  2. the sender didn't complain against id before
      */
     protected boolean isValidComplaintMessage(int sender, boolean isBroadcast, DKG.IDMessage complaintMessage){
         int i = sender;