remove a typo in user_behavior logging

src/users/log_user_stat.cpp

@@ -59,7 +59,7 @@ void LoggerUserStat::log_stat(){
     if (put_header){
         /* first time we log we add the header and erase previous log */
         file.open(log_folder + "/user_stats_behaviors.csv");
-        file << "user,job_id,submission_time, behavior_name,time_delayed\n";
+        file << "user,job_id,submission_time,behavior_name,time_delayed\n";
         put_header = false;
     }
     else{