Bumps `mavenVersion` from 3.6.3 to 3.9.9.

Updates `org.apache.maven:maven-plugin-api` from 3.6.3 to 3.9.9
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.3...maven-3.9.9)

Updates `org.apache.maven:maven-core` from 3.6.3 to 3.9.9

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-plugin-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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