Bump org.apache.maven.plugins:maven-dependency-plugin

Bumps [org.apache.maven.plugins:maven-dependency-plugin](https://github.com/apache/maven-dependency-plugin) from 3.6.0 to 3.8.1.
- [Release notes](https://github.com/apache/maven-dependency-plugin/releases)
- [Commits](apache/maven-dependency-plugin@maven-dependency-plugin-3.6.0...maven-dependency-plugin-3.8.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-dependency-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -311,7 +311,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-dependency-plugin</artifactId>
-                <version>3.6.0</version>
+                <version>3.8.1</version>
                 <executions>
                     <!-- only for unit tests ("test-jars" directory used in classpath) -->
                     <execution>