chore: add Union typing fix

Author: fabclmnt

src/ydata_profiling/model/summary_algorithms.py

@@ -1,5 +1,5 @@
 import functools
-from typing import Any, Callable, Optional, Tuple, TypeVar
+from typing import Any, Callable, Optional, Tuple, TypeVar, Union
 
 import numpy as np
 import pandas as pd