Fix the link to the rally docs in README.rst

The links to the rally docs are invalid.
This patch fixes it.

Change-Id: I8713a8cdf317d385e770528111b0ac376f89391f
Closes-Bug: #1718819

rally-jobs/README.rst

@@ -20,12 +20,12 @@ Structure
 Useful links
 ------------
 
-* More about Rally: https://rally.readthedocs.org/en/latest/
+* More about Rally: https://rally.readthedocs.io/en/latest/
 
-* Rally release notes: https://rally.readthedocs.org/en/latest/release_notes.html
+* Rally release notes: https://rally.readthedocs.io/en/latest/project_info/release_notes/archive.html
 
-* How to add rally-gates: https://rally.readthedocs.org/en/latest/gates.html
+* How to add rally-gates: http://rally.readthedocs.io/en/latest/quick_start/gates.html
 
-* About plugins:  https://rally.readthedocs.org/en/latest/plugins.html
+* About plugins:  https://rally.readthedocs.io/en/latest/plugins/index.html
 
 * Plugin samples: https://github.com/openstack/rally/tree/master/samples/plugins