Trivial: Update pypi url to new url

Pypi url changed from [1] to [2]

[1] https://pypi.python.org/pypi/<package>
[2] https://pypi.org/project/<package>

Change-Id: I91815d4e70a6ff8b7da50a528355094239226523

doc/source/contributor/kolla-for-openstack-development.rst

@@ -87,4 +87,4 @@ Once you run the code(restart the container), pdb can be accessed using
 .. end
 
 Learn more information about `remote_pdb
-<https://pypi.python.org/pypi/remote-pdb>`_.
+<https://pypi.org/project/remote-pdb/>`_.