[ci.jenkins.io] Maven 3.9.9 general availability

[Damien Duportal]

Hi dear contributors,

The Jenkins Infra team is pleased to announce that Maven 3.9.9 is now available and the default all agents and build tools of ci.jenkins.io.

Note that Jenkins Core itself is now using Maven 3.9.8 since yesterday weekly release.

Please check https://github.com/jenkins-infra/helpdesk/issues/4249  for details.

Damien DUPORTAL, for the Jenkins Infra team