Fix typo in knight_tour.py (TheAlgorithms#11173)

Author: FishyGitHubUser

backtracking/knight_tour.py

@@ -79,7 +79,7 @@ def open_knight_tour(n: int) -> list[list[int]]:
     >>> open_knight_tour(2)
     Traceback (most recent call last):
         ...
-    ValueError: Open Kight Tour cannot be performed on a board of size 2
+    ValueError: Open Knight Tour cannot be performed on a board of size 2
     """
 
     board = [[0 for i in range(n)] for j in range(n)]
@@ -91,7 +91,7 @@ def open_knight_tour(n: int) -> list[list[int]]:
                 return board
             board[i][j] = 0
 
-    msg = f"Open Kight Tour cannot be performed on a board of size {n}"
+    msg = f"Open Knight Tour cannot be performed on a board of size {n}"
     raise ValueError(msg)