Update the charm release process documentation.
Update the charm release process documentation.

jrwren/juju-gui,mitechie/juju-gui,mitechie/juju-gui,jrwren/juju-gui,jrwren/juju-gui,bac/juju-gui,bac/juju-gui,mitechie/juju-gui,bac/juju-gui,mitechie/juju-gui,bac/juju-gui,jrwren/juju-gui