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-alpha-2 to 4.0.0-beta-3.
- [Release notes](https://github.com/apache/maven-plugin-testing/releases)
- [Commits](apache/maven-plugin-testing@maven-plugin-testing-4.0.0-alpha-2...maven-plugin-testing-4.0.0-beta-3)

---
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] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -157,7 +157,7 @@
     <dependency>
       <groupId>org.apache.maven.plugin-testing</groupId>
       <artifactId>maven-plugin-testing-harness</artifactId>
-      <version>4.0.0-alpha-2</version>
+      <version>4.0.0-beta-3</version>
       <scope>test</scope>
     </dependency>
     <dependency>