Clarify dataset_id docstring in get_dataset (fixes #1066) (#1400)

* Update docstring to clarify dataset_id can be name or ID (fixes #1066)

* Add indentation

---------

Co-authored-by: Pieter Gijsbers <p.gijsbers@tue.nl>

Author: Roshangoli

openml/datasets/functions.py

@@ -479,7 +479,7 @@ def get_dataset(  # noqa: C901, PLR0912
     Parameters
     ----------
     dataset_id : int or str
-        The ID or name of the dataset to download.
+        Dataset ID (integer) or dataset name (string) of the dataset to download.
     download_data : bool (default=False)
         If True, also download the data file. Beware that some datasets are large and it might
         make the operation noticeably slower. Metadata is also still retrieved.