pypi.python.org -> pypi.org (GH-7613) (GH-7614)

(cherry picked from commit 9d6d06e8065d45f375f4a80e2d7e13b032da1f5b)

Co-authored-by: Ned Deily <nad@python.org>
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 9302ded..382696d 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -2,7 +2,7 @@
 # Test tools for mocking and patching.
 # Maintained by Michael Foord
 # Backport for other versions of Python available from
-# http://pypi.python.org/pypi/mock
+# https://pypi.org/project/mock
 
 __all__ = (
     'Mock',