Bump maven-core.version from 3.9.6 to 3.9.12 in /lang/java

Bumps `maven-core.version` from 3.9.6 to 3.9.12.

Updates `org.apache.maven:maven-core` from 3.9.6 to 3.9.12

Updates `org.apache.maven:maven-compat` from 3.9.6 to 3.9.12
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.9.6...maven-3.9.12)

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-core
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven:maven-compat
  dependency-version: 3.9.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

lang/java/pom.xml

@@ -49,7 +49,7 @@
     <jetty.version>9.4.57.v20241219</jetty.version>
     <jopt-simple.version>5.0.4</jopt-simple.version>
     <junit5.version>5.13.4</junit5.version>
-    <maven-core.version>3.9.6</maven-core.version>
+    <maven-core.version>3.9.12</maven-core.version>
     <mockito.version>5.18.0</mockito.version>
     <netty.version>4.2.3.Final</netty.version>
     <protobuf.version>4.31.1</protobuf.version>