Bump mavenVersion from 3.9.11 to 3.9.12

Bumps `mavenVersion` from 3.9.11 to 3.9.12.

Updates `org.apache.maven:maven-plugin-api` from 3.9.11 to 3.9.12
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.9.11...maven-3.9.12)

Updates `org.apache.maven:maven-repository-metadata` from 3.9.11 to 3.9.12

Updates `org.apache.maven:maven-artifact` from 3.9.11 to 3.9.12

Updates `org.apache.maven:maven-core` from 3.9.11 to 3.9.12

Updates `org.apache.maven:maven-model` from 3.9.11 to 3.9.12

Updates `org.apache.maven:maven-settings` from 3.9.11 to 3.9.12

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-plugin-api
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven:maven-repository-metadata
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven:maven-artifact
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
- 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-model
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven:maven-settings
  dependency-version: 3.9.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -92,7 +92,7 @@
 
   <properties>
     <scmpublish.content>${project.build.directory}/staging/mrm</scmpublish.content>
-    <mavenVersion>3.9.11</mavenVersion>
+    <mavenVersion>3.9.12</mavenVersion>
     <minimalMavenBuildVersion>3.6.3</minimalMavenBuildVersion>
     <mojo.java.target>8</mojo.java.target>
     <jetty.version>9.4.58.v20250814</jetty.version>