bpo-33503: Fix the broken pypi link in the source and the documentation (GH-6814) (GH-6872)

(cherry picked from commit 19177fbd5d6d9b29ccc302d65f9d9417ece082ce)

Co-authored-by: Stéphane Wirtel <stephane@wirtel.be>
diff --git a/Doc/distutils/apiref.rst b/Doc/distutils/apiref.rst
index 9fce46a..3c89468 100644
--- a/Doc/distutils/apiref.rst
+++ b/Doc/distutils/apiref.rst
@@ -78,7 +78,7 @@
    |                    | be built                       | :class:`distutils.core.Extension`                           |
    +--------------------+--------------------------------+-------------------------------------------------------------+
    | *classifiers*      | A list of categories for the   | a list of strings; valid classifiers are listed on `PyPI    |
-   |                    | package                        | <https://pypi.python.org/pypi?:action=list_classifiers>`_.  |
+   |                    | package                        | <https://pypi.org/classifiers>`_.                           |
    +--------------------+--------------------------------+-------------------------------------------------------------+
    | *distclass*        | the :class:`Distribution`      | a subclass of                                               |
    |                    | class to use                   | :class:`distutils.core.Distribution`                        |