fix python matrix transpose logic

apps/website/contents/algorithms/matrix.md

@@ -59,7 +59,7 @@ Many grid-based games can be modeled as a matrix, such as Tic-Tac-Toe, Sudoku, C
 Transposing a matrix in Python is simply:
 
 ```py
-transposed_matrix = zip(*matrix)
+transposed_matrix = list(zip(*matrix))
 ```
 
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