Add a note to the changelog

CHANGELOG.rst

@@ -6,6 +6,9 @@ Changelog
 Unreleased
 ++++++++++
 
+- Massive improvements in performance for ``Interpreter`` (e.g. IPython) users.
+  This especially affects ``pandas`` users with large datasets.
+
 0.18.2 (2022-11-21)
 +++++++++++++++++++
 

jedi/inference/compiled/access.py

@@ -9,7 +9,7 @@ import re
 import builtins
 import typing
 from pathlib import Path
-from typing import Optional, Tuple, Union
+from typing import Optional, Tuple
 
 from jedi.inference.compiled.getattr_static import getattr_static