build(deps): bump maven.version from 3.9.9 to 3.9.12

Bumps `maven.version` from 3.9.9 to 3.9.12.

Updates `org.apache.maven:maven-plugin-api` from 3.9.9 to 3.9.12
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.9.9...maven-3.9.12)

Updates `org.apache.maven:maven-core` from 3.9.9 to 3.9.12

Updates `org.apache.maven:maven-artifact` from 3.9.9 to 3.9.12

Updates `org.apache.maven:maven-compat` from 3.9.9 to 3.9.12
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.9.9...maven-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-core
  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-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]

plugins/templates-maven-plugin/pom.xml

@@ -38,7 +38,7 @@
   <properties>
     <maven.compiler.source>17</maven.compiler.source>
     <maven.compiler.target>17</maven.compiler.target>
-    <maven.version>3.9.9</maven.version>
+    <maven.version>3.9.12</maven.version>
     <dataflow.api.version>0.7.6</dataflow.api.version>
     <mojo.executor.version>2.4.1</mojo.executor.version>
     <maven-plugin.version>3.15.1</maven-plugin.version>