Update the 2024.1 release notes configuration to build from unmaintained/2024.1. Change-Id: Ib4965a30bb648f98bdf7f08e42f632a2acbfa6ff Signed-off-by: OpenStack Release Bot <infra-root@openstack.org> Generated-By: openstack/project-config:roles/copy-release-tools-scripts/files/release-tools/change_reno_branch_to_unmaintained.sh