Fix url to ansible site in kolla-ansible.rst

Story: 2008961
Task: 42597
Change-Id: I2637085a1df22e39d64c33b823fc948063d3e06f

doc/source/configuration/reference/kolla-ansible.rst

@@ -546,7 +546,7 @@ directory is copied directly into the Kolla Ansible inventory, Kolla
 Ansible group names should be used. It should be noted that
 ``extra-vars`` and ``host_vars`` take precedence over ``group_vars``. For
 more information on variable precedence see the Ansible `documentation
-<http://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable>`_.
+<https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable>`_.
 
 Example: configure a Nova cell
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^