Add type annotations to odd_even_sort

Author: karrad1201

sorts/odd_even_sort.py

@@ -5,7 +5,7 @@
 """
 
 
-def odd_even_sort(input_list: list) -> list:
+def odd_even_sort(input_list: list[int]) -> list[int]:
     """
     Sort input with odd even sort.