systemd-networkd: Unable to acquire IPv6 DNS server address

I found that starting from Ubuntu 22, when using systemd-networkd as the netplan backend, the IPV6 DNS server cannot be obtained through DHCPv6. I reported the issue to the systemd team and they located and fixed the issue. How can I get these updates in ubuntu packages?

issue details: https://github.com/systemd/systemd/issues/28566

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: systemd 249.11-0ubuntu3.10
ProcVersionSignature: Ubuntu 5.15.0-86.96-generic 5.15.122
Uname: Linux 5.15.0-86-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
Date: Wed Oct 11 03:58:58 2023
InstallationDate: Installed on 2023-10-09 (1 days ago)
InstallationMedia: Ubuntu-Server 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230810)