Trivial Fix

Release note fix.
Extra space looks odd when built.

TrivialFix

Change-Id: I5b5d0f66246e25fcb3619992a96558744cf943ca

Author: ankur-odl

releasenotes/notes/bp-extension-show-6f7e31a27dad0dc9.yaml

@@ -4,5 +4,4 @@ features:
     Added `openstack extension show` command to allow users
     to view the details of the extension. Currently works only for
     network extensions.
-
     [Blueprint `extension-show <https://blueprints.launchpad.net/python-openstackclient/+spec/extension-show>`_]