try to make the ChangeLog template more inviting

move it even futher up and encourage integrating it into the rest of the
commit message.

Change-Id: I5aaa417a58d420c3d3a8d5ca80dcd9f265c64829
Reviewed-by: Sergio Ahumada <sahumada@gmail.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>