Fix broken links

Author: dukecat0

source/index.rst

@@ -29,7 +29,7 @@ This guide is maintained on `GitHub`_ by the `Python Packaging Authority`_. We
 happily accept any :doc:`contributions and feedback <contribute>`. 😊
 
 .. _GitHub: https://github.com/pypa/packaging.python.org
-.. _Python Packaging Authority: https://pypa.io
+.. _Python Packaging Authority: https://www.pypa.io/en/latest/
 
 
 Get started

source/overview.rst

@@ -206,7 +206,7 @@ respective packaging guides.
 * `Google App Engine <https://cloud.google.com/appengine/docs/python/>`_
 * `PythonAnywhere <https://www.pythonanywhere.com/>`_
 * `OpenShift <https://cloud.redhat.com/blog/getting-started-python>`_
-* "Serverless" frameworks like `Zappa <https://www.zappa.io/>`_
+* "Serverless" frameworks like `Zappa <https://github.com/zappa/Zappa>`_
 
 In all these setups, the platform takes care of packaging and
 deployment, as long as you follow their patterns. Most software does