fix types

Author: wjayesh

huggingface-sagemaker/steps/promotion/promote_metric_compare_promoter.py

@@ -28,8 +28,8 @@
 
 @step
 def promote_metric_compare_promoter(
-    latest_metrics: Dict[str, str],
-    current_metrics: Dict[str, str],
+    latest_metrics: Dict[str, float],
+    current_metrics: Dict[str, float],
     metric_to_compare: str = "accuracy",
 ):
     """Try to promote trained model.