Update Heroku Python guide link

Author: kuyan

docs/scenarios/web.rst

@@ -160,14 +160,14 @@ uWSGI
 -----
 
 `uWSGI <https://uwsgi-docs.readthedocs.org>`_ is a full stack for building
-hosting services.  In addition to process management, process monitoring, 
-and other functionality, uWSGI acts as an application server for various 
+hosting services.  In addition to process management, process monitoring,
+and other functionality, uWSGI acts as an application server for various
 programming languages and protocols - including Python and WSGI. uWSGI can
-either be run as a stand-alone web router, or be run behind a full web 
+either be run as a stand-alone web router, or be run behind a full web
 server (such as Nginx or Apache).  In the latter case, a web server can
 configure uWSGI and an application's operation over the
 `uwsgi <https://uwsgi-docs.readthedocs.org/en/latest/Protocol.html>`_
-protocol.  uWSGI's web server support allows for dynamically configuring 
+protocol.  uWSGI's web server support allows for dynamically configuring
 Python, passing environment variables and further tuning.  For full details,
 see `uWSGI magic
 variables <https://uwsgi-docs.readthedocs.org/en/latest/Vars.html>`_.
@@ -221,9 +221,9 @@ start to charge you once you "scale" your application to run on more than one
 Dyno (abstracted servers) at a time.
 
 Heroku publishes `step-by-step instructions
-<http://devcenter.heroku.com/articles/python>`_ on how to set up your first
-application for use in Heroku, and maintains a list of `example applications
-<http://python.herokuapp.com/>`_.
+<https://devcenter.heroku.com/articles/getting-started-with-python>`_ on
+how to set up your first application for use in Heroku, and maintains a
+list of `example applications <http://python.herokuapp.com/>`_.
 
 
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