Update doc for manila-service-image download
It currently refers to the old openstack repository and as written
downloads redirect information rather than the image itself.
Add a '-L' argument to the ``curl`` command to handle redirects and
update the URL to use the opendev repository.
Related-bug:
@@ -73,7 +73,8 @@ server is an instance where NFS shares are served.
.. code-block:: console
- $ curl https://tarballs.openstack.org/manila-image-elements/images/manila-service-image-master.qcow2 | \
+ $ curl -L \
+ https://tarballs.opendev.org/openstack/manila-image-elements/images/manila-service-image-master.qcow2 | \
glance image-create \
--name "manila-service-image" \
--disk-format qcow2 \
