Bump org.apache.maven.plugin-testing:maven-plugin-testing-harness

Bumps org.apache.maven.plugin-testing:maven-plugin-testing-harness from 3.3.0 to 3.4.0.

---
updated-dependencies:
- dependency-name: org.apache.maven.plugin-testing:maven-plugin-testing-harness
  dependency-version: 3.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -97,7 +97,7 @@ under the License.
     <jettyVersion>9.4.58.v20250814</jettyVersion>
     <mockito.version>4.11.0</mockito.version>
     <plexus-archiver.version>4.10.3</plexus-archiver.version>
-    <pluginTestingVersion>3.3.0</pluginTestingVersion>
+    <pluginTestingVersion>3.4.0</pluginTestingVersion>
 
     <!-- TODO remove with next parent -->
     <version.maven-invoker-plugin>3.9.1</version.maven-invoker-plugin>