chore(deps): bump maven-pmd-plugin from 3.15.0 to 3.20.0

Bumps [maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 3.15.0 to 3.20.0.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](apache/maven-pmd-plugin@maven-pmd-plugin-3.15.0...maven-pmd-plugin-3.20.0)

---
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] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -104,7 +104,7 @@
 		<checkstyle-plugin.version>3.2.0</checkstyle-plugin.version>
 		<checkstyle.version>10.5.0</checkstyle.version>
 		<jacoco.version>0.8.7</jacoco.version>
-		<pmd-plugin.version>3.19.0</pmd-plugin.version>
+		<pmd-plugin.version>3.20.0</pmd-plugin.version>
 		<pmd.version>6.52.0</pmd.version>
 		<versions-maven-plugin.version>2.13.0</versions-maven-plugin.version>
 		<license-plugin.version>4.1</license-plugin.version>