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

Bumps [org.apache.maven.plugin-testing:maven-plugin-testing-harness](https://github.com/apache/maven-plugin-testing) from 4.0.0-beta-2-SNAPSHOT to 4.0.0-beta-2.
- [Release notes](https://github.com/apache/maven-plugin-testing/releases)
- [Commits](https://github.com/apache/maven-plugin-testing/commits/maven-plugin-testing-4.0.0-beta-2)

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -78,7 +78,7 @@ under the License.
     <junit4Version>4.13.2</junit4Version>
     <junitVersion>5.10.1</junitVersion>
     <mockitoVersion>5.12.0</mockitoVersion>
-    <mavenPluginTestingHarnessVersion>4.0.0-beta-2-SNAPSHOT</mavenPluginTestingHarnessVersion>
+    <mavenPluginTestingHarnessVersion>4.0.0-beta-2</mavenPluginTestingHarnessVersion>
     <plexusCompilerVersion>2.15.0</plexusCompilerVersion>
     <plexusJavaVersion>1.2.0</plexusJavaVersion>
     <sisuPlexusVersion>0.9.0.M2</sisuPlexusVersion>