Bump org.apache.maven.plugins:maven-pmd-plugin from 3.19.0 to 3.21.2

Bumps [org.apache.maven.plugins:maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 3.19.0 to 3.21.2.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](apache/maven-pmd-plugin@maven-pmd-plugin-3.19.0...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]

pom.xml

@@ -79,7 +79,7 @@
 		<maven-compiler-plugin-version>3.10.1</maven-compiler-plugin-version>
 		<maven-jar-plugin-version>3.3.0</maven-jar-plugin-version>
 		<maven-surefire-plugin-version>2.22.2</maven-surefire-plugin-version>
-		<maven-pmd-plugin-version>3.19.0</maven-pmd-plugin-version>
+		<maven-pmd-plugin-version>3.21.2</maven-pmd-plugin-version>
 		<maven-source-plugin-version>3.2.1</maven-source-plugin-version>
 		<maven-javadoc-plugin-version>3.4.1</maven-javadoc-plugin-version>
 		<maven-shade-plugin-version>3.4.1</maven-shade-plugin-version>