[mypy] Add/fix type annotations for recursive_insertion_sort(TheAlgorithms#4085)

Author: goodm2

Diff for: sorts/recursive_insertion_sort.py

@@ -4,6 +4,8 @@
 
 from __future__ import annotations
 
+from typing import List
+
 
 def rec_insertion_sort(collection: list, n: int):
     """
@@ -70,6 +72,6 @@ def insert_next(collection: list, index: int):
 
 if __name__ == "__main__":
     numbers = input("Enter integers separated by spaces: ")
-    numbers = [int(num) for num in numbers.split()]
-    rec_insertion_sort(numbers, len(numbers))
-    print(numbers)
+    number_list: List[int] = [int(num) for num in numbers.split()]
+    rec_insertion_sort(number_list, len(number_list))
+    print(number_list)