DOC: Updated get_dataset_range function doc

Author: robertmaierle

databento/historical/api/metadata.py

@@ -230,7 +230,8 @@ def get_dataset_range(
         dataset: Dataset | str,
     ) -> dict[str, str]:
         """
-        Request the available range for the dataset from Databento.
+        Request the available range for the dataset given the user's
+        entitlements.
 
         Makes a GET `/metadata.get_dataset_range` HTTP request.