Bump org.mockito:mockito-core from 4.6.1 to 5.15.2

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 4.6.1 to 5.15.2.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v4.6.1...v5.15.2)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

maven-plugin-testing-harness/pom.xml

@@ -160,7 +160,7 @@ under the License.
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>4.6.1</version>
+      <version>5.15.2</version>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>