rsa1024 signing key

[Juri Grabowski]

After adding launchpad stable repository with
sudo apt-add-repository ppa:x2go/stable
it comes to following warning in apt after apt update:
W: https://ppa.launchpadcontent.net/x2go/stable/ubuntu/dists/noble/InRelease: Signature by key A7D8D681B1C07FE41499323D7CDE3A860A53F9FD uses weak algorithm (rsa1024)

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: x2goclient 4.1.2.3-1build3
ProcVersionSignature: Ubuntu 6.8.0-38.38-generic 6.8.8
Uname: Linux 6.8.0-38-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5json:
 {
   "result": "skip"
 }
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul 29 21:28:30 2024
InstallationDate: Installed on 2023-04-24 (462 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: x2goclient
UpgradeStatus: Upgraded to noble on 2024-04-20 (101 days ago)