Fix type annotations for integer_partition.py TheAlgorithms#4052 (TheAlgorithms#4689)

Author: aswinmurali-io

Diff for: dynamic_programming/integer_partition.py

@@ -6,8 +6,8 @@
 """
 
 
-def partition(m):
-    memo = [[0 for _ in range(m)] for _ in range(m + 1)]
+def partition(m: int) -> int:
+    memo: list[list[int]] = [[0 for _ in range(m)] for _ in range(m + 1)]
     for i in range(m + 1):
         memo[i][0] = 1