chore(deps): bump org.mockito:mockito-junit-jupiter

Bumps [org.mockito:mockito-junit-jupiter](https://github.com/mockito/mockito) from 5.18.0 to 5.21.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.21.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-version: 5.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

core/build.gradle

@@ -5,6 +5,6 @@ dependencies {
 	implementation 'com.google.code.gson:gson:2.9.1'
 
 	testImplementation 'com.squareup.okhttp3:mockwebserver:4.9.0'
-	testImplementation 'org.mockito:mockito-core:5.18.0'
-	testImplementation 'org.mockito:mockito-junit-jupiter:5.18.0'
+	testImplementation 'org.mockito:mockito-core:5.21.0'
+	testImplementation 'org.mockito:mockito-junit-jupiter:5.21.0'
 }