Bump org.mockito.kotlin:mockito-kotlin in /forgerock-core

Bumps [org.mockito.kotlin:mockito-kotlin](https://github.com/mockito/mockito-kotlin) from 4.0.0 to 5.2.0.
- [Release notes](https://github.com/mockito/mockito-kotlin/releases)
- [Commits](mockito/mockito-kotlin@4.0.0...5.2.0)

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

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

forgerock-core/build.gradle

@@ -119,7 +119,7 @@ dependencies {
 
     testImplementation 'com.madgag.spongycastle:bcpkix-jdk15on:1.58.0.0'
     testImplementation 'org.mockito:mockito-core:4.8.1'
-    testImplementation 'org.mockito.kotlin:mockito-kotlin:4.0.0'
+    testImplementation 'org.mockito.kotlin:mockito-kotlin:5.2.0'
     testImplementation 'org.powermock:powermock-module-junit4:2.0.9'
     testImplementation 'org.powermock:powermock-api-mockito2:2.0.9'