Upgrade to Apache Maven 3.9.12

[Sanne]

Description

Apache Maven 3.9.12 was released today, and finally seems to have resolved the fact that it was still logging warnings about Unsafe usage.

Release notes

Remove usage of terminally deprecated methods in Guice to eliminate warnings in JDK 25+

Implementation ideas

No response

[quarkus-bot]

/cc @quarkusio/devtools (maven)