fix: Import TypeAlias from typing_extensions

Author: eddiebergman

src/ConfigSpace/read_and_write/dictionary.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import warnings
-from typing import TYPE_CHECKING, Any, Callable, TypeAlias
+from typing import TYPE_CHECKING, Any, Callable
+from typing_extensions import TypeAlias
 
 from ConfigSpace.conditions import (
     AndConjunction,