Bump mikepenz/action-junit-report from 2 to 4

Bumps [mikepenz/action-junit-report](https://github.com/mikepenz/action-junit-report) from 2 to 4.
- [Release notes](https://github.com/mikepenz/action-junit-report/releases)
- [Commits](https://github.com/mikepenz/action-junit-report/compare/v2...v4)

---
updated-dependencies:
- dependency-name: mikepenz/action-junit-report
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/maven.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Build with Maven
         run: ./mvnw -s .settings.xml clean org.jacoco:jacoco-maven-plugin:prepare-agent install -U -P sonar -nsu --batch-mode -Dmaven.test.redirectTestOutputToFile=true -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
       - name: Publish Test Report
-        uses: mikepenz/action-junit-report@v2
+        uses: mikepenz/action-junit-report@v4
         if: always() # always run even if the previous step fails
         with:
           report_paths: '**/surefire-reports/TEST-*.xml'