Bump maven-pmd-plugin from 3.14.0 to 3.15.0

Bumps [maven-pmd-plugin](https://github.com/apache/maven-pmd-plugin) from 3.14.0 to 3.15.0.
- [Release notes](https://github.com/apache/maven-pmd-plugin/releases)
- [Commits](apache/maven-pmd-plugin@maven-pmd-plugin-3.14.0...maven-pmd-plugin-3.15.0)

---
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] <support@github.com>

pom.xml

@@ -292,7 +292,7 @@
       </plugin>
       <plugin>
         <artifactId>maven-pmd-plugin</artifactId>
-        <version>3.14.0</version>
+        <version>3.15.0</version>
         <configuration>
           <targetJdk>${maven.compiler.target}</targetJdk>
         </configuration>

src/changes/changes.xml

@@ -79,7 +79,7 @@ The <action> type attribute can be add,update,fix,remove.
     <action                  type="update" dev="kinow" due-to="Dependabot">Bump actions/setup-java from v1.4.0 to v1.4.3 #147 #156 #155 #172 #215.</action>
     <action                  type="update" dev="kinow" due-to="Dependabot">Bump commons-parent from 51 to 52 #145.</action>
     <action                  type="update" dev="kinow" due-to="Dependabot">Bump actions/checkout from v1 to v2.3.4 #138 #146 #165 #183.</action>
-    <action                  type="update" dev="kinow" due-to="Dependabot">Bump maven-pmd-plugin from 3.13.0 to 3.14.0 #186.</action>
+    <action                  type="update" dev="kinow" due-to="Dependabot">Bump maven-pmd-plugin from 3.13.0 to 3.15.0 #186 #263.</action>
     <action                  type="update" dev="ggregory" due-to="Dependabot">Bump graalvm.version from 20.2.0 to 21.2.0 #185 #198 #206 #227 #252.</action>
     <action                  type="update" dev="ggregory" due-to="Gary Gregory">Update commons.japicmp.version 0.14.3 -> 0.15.3.</action>
     <action                  type="update" dev="ggregory" due-to="Gary Gregory">Update commons.jacoco.version 0.8.5 to 0.8.7; fixes Java 15 build.</action>