Update the 2024.1 release notes configuration to build from unmaintained/2024.1. Change-Id: Ic2592d22b36b22f3cf48a21d81bfb0b41b31ae86 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