net-mgmt/librenms: Update to 23.4.0
re: https://github.com/librenms/librenms/releases/tag/23.4.0
This is what we missed (there was no 23.3.0 release)
https://github.com/librenms/librenms/releases/tag/23.2.0
https://github.com/librenms/librenms/releases/tag/23.1.1