Change httpx to httpx2 and update docstring

Updated import from httpx to httpx2 and modified docstring for dataset return type.

Author: cclauss

machine_learning/linear_regression_vectorized.py

@@ -1,16 +1,8 @@
-import httpx
-import numpy as np
-
 """
 Vectorized Linear Regression using Gradient Descent
 
 Author: Somrita Banerjee (mailto:somritabanerjee126@gmail.com)
 
-Requirements:
-- Python >= 3.13
-- numpy
-- httpx
-
 Dataset used: CSGO dataset (ADR vs Rating)
 
 References:
@@ -20,24 +12,27 @@
 # /// script
 # requires-python = ">=3.13"
 # dependencies = [
-#     "httpx",
+#     "httpx2",
 #     "numpy",
 # ]
 # ///
 
+import httpx2
+import numpy as np
+
 
 def collect_dataset() -> np.ndarray:
     """Collect dataset of CSGO (ADR vs Rating).
 
-    :return: dataset as numpy array
+    :return: dataset as a NumPy array
 
     >>> ds = collect_dataset()
     >>> isinstance(ds, np.ndarray)
     True
     >>> ds.shape[1] >= 2
     True
     """
-    response = httpx.get(
+    response = httpx2.get(
         "https://raw.githubusercontent.com/yashLadha/The_Math_of_Intelligence/"
         "master/Week1/ADRvsRating.csv",
         timeout=10,
@@ -98,10 +93,6 @@ def mean_absolute_error(predicted_y: np.ndarray, original_y: np.ndarray) -> floa
 
 
 def main() -> None:
-    """Driver function.
-
-    >>> main()  # doctest: +SKIP
-    """
     dataset = collect_dataset()
 
     m = dataset.shape[0]