Update dependency org.apache.maven.plugins:maven-pmd-plugin to v3.15.0

Author: renovate-bot

pom.xml

@@ -48,7 +48,7 @@
         <maven-compiler-plugin>3.8.1</maven-compiler-plugin>
         <maven-enforcer-plugin>3.0.0</maven-enforcer-plugin>
         <spotbugs-maven-plugin>4.4.2</spotbugs-maven-plugin>
-        <maven-pmd-plugin>3.13.0</maven-pmd-plugin>
+        <maven-pmd-plugin>3.15.0</maven-pmd-plugin>
         <fast-build>false</fast-build>
 
         <pmdVersion>6.17.0</pmdVersion>