Bump maven-pmd-plugin from 2.3 to 3.14.0

Bumps [maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 2.3 to 3.14.0.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](https://github.com/apache/maven-pmd-plugin/compare/maven-pmd-plugin-2.3...maven-pmd-plugin-3.14.0)

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