fix typo

logmetric.py

@@ -195,7 +195,7 @@ class LogMetric(evaluate.Metric):
         # TODO: get separate log entries (split before timestamps), replace timestamps with token and compare the log entry with BLEU
 
         t_before_logmetric = time.perf_counter()
-        timestamp_score = np.mean([self.getLogMetric(p,r, sacrebleu) for p,r in zip(predictions,references)])
+        timestamp_score = np.mean([self.getLogMetric(p,r, self.sacrebleu) for p,r in zip(predictions,references)])
         t_after_logmetric = time.perf_counter()
 
         logmetric_duration = f" {t_after_logmetric - t_before_logmetric:0.10f}"