chore(deps-dev): bump maven.dependency.mockito.version

Bumps `maven.dependency.mockito.version` from 5.5.0 to 5.6.0.

Updates `org.mockito:mockito-core` from 5.5.0 to 5.6.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.5.0...v5.6.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.5.0 to 5.6.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.5.0...v5.6.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -24,7 +24,7 @@
         <maven.dependency.log4j.version>2.20.0</maven.dependency.log4j.version>
         <maven.dependency.sentry.version>6.30.0</maven.dependency.sentry.version>
         <maven.dependency.junit.version>5.10.0</maven.dependency.junit.version>
-        <maven.dependency.mockito.version>5.5.0</maven.dependency.mockito.version>
+        <maven.dependency.mockito.version>5.6.0</maven.dependency.mockito.version>
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.assembly.mainClass>de.l3s.maintenance.resources.ReindexResources</maven.assembly.mainClass>