fix error

lm_eval/api/task.py

@@ -23,11 +23,11 @@ from lm_eval.api.filter import FilterEnsemble
 from lm_eval.logger import eval_logger
 from lm_eval.prompts import get_prompt
 from lm_eval.filters import build_filter_ensemble
-from lm_eval.metrics import metric_max_over_ground_truths
 from lm_eval.api.metrics import (
     mean,
     weighted_perplexity,
     bits_per_byte,
+    metric_max_over_ground_truths,
 )
 from lm_eval.api.registry import (
     get_metric,