Bump org.apache.maven.plugins:maven-pmd-plugin from 3.21.0 to 3.21.2

Bumps [org.apache.maven.plugins:maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 3.21.0 to 3.21.2.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](apache/maven-pmd-plugin@maven-pmd-plugin-3.21.0...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-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -23,7 +23,7 @@
         <spotbugs.version>4.7.3.6</spotbugs.version>
         <spotbugs-annotations.version>4.8.0</spotbugs-annotations.version>
         <findsecbugs.version>1.12.0</findsecbugs.version>
-        <pmd-plugin.version>3.21.0</pmd-plugin.version>
+        <pmd-plugin.version>3.21.2</pmd-plugin.version>
         <pmd.version>6.55.0</pmd.version>
         <checkstyle-plugin.version>3.3.1</checkstyle-plugin.version>
         <checkstyle.version>10.12.4</checkstyle.version>