Fix float input

pr_auc.py

@@ -72,7 +72,7 @@ class PRAUC(evaluate.Metric):
             inputs_description=_KWARGS_DESCRIPTION,
             # This defines the format of each prediction and reference
             features=datasets.Features({
-                'predictions': datasets.Value('int64'),
+                'prediction_scores': datasets.Sequence(datasets.Value("float")),
                 'references': datasets.Value('int64'),
             }),
             # Homepage of the module for documentation