Replace http with https for doc links

Change-Id: Ib3234a6194b1595a7fa8f9d0c69d44dc1f399f4c
diff --git a/README.rst b/README.rst
index f2ccb6a..ca88f76 100644
--- a/README.rst
+++ b/README.rst
@@ -7,9 +7,9 @@
 Tempest plugin to test Manila's features
 
 * Free software: Apache license
-* Documentation: http://docs.openstack.org/developer/openstack
-* Source: http://git.openstack.org/cgit/openstack/manila-tempest-plugin
-* Bugs: http://bugs.launchpad.net/manila-tempest-plugin
+* Documentation: https://docs.openstack.org/developer/openstack
+* Source: https://git.openstack.org/cgit/openstack/manila-tempest-plugin
+* Bugs: https://bugs.launchpad.net/manila-tempest-plugin
 
 Features
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