Bump org.mockito:mockito-core from 5.12.0 to 5.13.0

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.12.0 to 5.13.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.12.0...v5.13.0)

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

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

build.gradle

@@ -73,7 +73,7 @@ subprojects { Project sub ->
         }
 
         testImplementation project.deps.gocdPluginApi
-        testImplementation 'org.mockito:mockito-core:5.12.0'
+        testImplementation 'org.mockito:mockito-core:5.13.0'
         testImplementation group: 'org.assertj', name: 'assertj-core', version: '3.26.3'
         testImplementation platform('org.junit:junit-bom:5.11.0')
         testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api'