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] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -65,7 +65,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>8</java.version>
     <org.apache.maven.version>3.9.11</org.apache.maven.version>
-    <org.apache.maven.plugin-testing.version>3.3.0</org.apache.maven.plugin-testing.version>
+    <org.apache.maven.plugin-testing.version>3.4.0</org.apache.maven.plugin-testing.version>
     <org.apache.maven.plugin-tools.version>3.15.2</org.apache.maven.plugin-tools.version>
     <org.apache.sshd.version>2.16.0</org.apache.sshd.version>
     <org.eclipse.jgit.version>5.13.5.202508271544-r</org.eclipse.jgit.version>