chore(deps): bump org.apache.maven.plugins:maven-pmd-plugin

Bumps [org.apache.maven.plugins:maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 3.16.0 to 3.21.2.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](apache/maven-pmd-plugin@maven-pmd-plugin-3.16.0...maven-pmd-plugin-3.21.2)

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

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

Author: dependabot[bot]

module/pom.xml

@@ -49,7 +49,7 @@
     <maven.surefire.report.plugin>3.2.2</maven.surefire.report.plugin>
     <maven.javadoc.plugin>3.2.0</maven.javadoc.plugin>
     <maven.checkstyle.plugin>3.3.0</maven.checkstyle.plugin>
-    <maven.pmd.plugin>3.16.0</maven.pmd.plugin>
+    <maven.pmd.plugin>3.21.2</maven.pmd.plugin>
     <maven.jacoco.plugin>0.8.5</maven.jacoco.plugin>
     <maven.gpg.plugin>1.6</maven.gpg.plugin>
     <maven.site.plugin>3.12.1</maven.site.plugin>