At the moment project documentation does not contain any mention
on how changelog should be produced.
Some use reno, some use fragments. At the moment there is no transition
from reno to antsibull format is available, so let's ask contributors to
follow ansible's format of changelog fragments.
In case we come up with a transition layer from reno to fragment format,
or antsibull replacement, we can change documentation.
Change-Id: I048f80af849d2872be866e44882d2a8fcbf01cfc
Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>
