d/copyright: use https in the URL
d/copyright: use https in the URL

Use https in the URL. Usually lintian complains about this kind of things.

Change-Id: Ib1406ee6d8c1a24a5ba6bd29c64b80e77eff6fb9
Signed-off-by: Arturo Borrero Gonzalez <08787c72be15fc0aaf7bfde37e2aab5e1957f12a@wikimedia.org>

wikimedia/operations-debs-flannel,wikimedia/operations-debs-flannel,wikimedia/operations-debs-flannel