fix: typos

Author: Jeel Gajera

machine_learning/ordinary_least_squares_regression.py

@@ -16,7 +16,7 @@
 import numpy as np
 
 
-def ols_regression(x, y):
+def ols_regression(x: np.ndarray, y: np.ndarray) -> tuple:
     """
     Performs Ordinary Least Squares Regression (OLSR) on the given data.