DOC: Fix external link formatting in basics.rst

Author: Shashwat1001

doc/source/user_guide/basics.rst

@@ -213,7 +213,7 @@ Be careful when using raw Python lists in binary operations with DataFrames.
 Unlike NumPy arrays or Series, lists are not broadcast across rows or columns.
 Instead, pandas attempts to match the entire list against a single axis, which may lead to confusing results such as Series of arrays.
 To ensure proper broadcasting behavior, use a NumPy array or Series with explicit index or shape.
-See also: :ref:`numpy broadcasting <https://numpy.org/doc/stable/user/basics.broadcasting.html>`
+See also: `numpy broadcasting <https://numpy.org/doc/stable/user/basics.broadcasting.html>`_
 Furthermore you can align a level of a MultiIndexed DataFrame with a Series.
 
 .. ipython:: python