[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

data_structures/binary_tree/maximum_sum_bst.py

@@ -12,7 +12,7 @@ class TreeNode:
     right: "TreeNode" = None
 
 
-def max_sum_bst(root: TreeNode ) -> int:
+def max_sum_bst(root: TreeNode) -> int:
     """
     The solution traverses a binary tree to find the maximum sum of
     keys in any subtree that is a Binary Search Tree (BST). It uses