Bump org.mockito:mockito-core from 5.20.0 to 5.21.0 (#970)

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.20.0 to 5.21.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v5.20.0...v5.21.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -114,7 +114,7 @@ subprojects {
         commonsMathVersion = '3.6.1'
         junitVersion = '5.13.4'
         log4jVersion = '2.24.3'
-        mockitoVersion = '5.20.0'
+        mockitoVersion = '5.21.0'
         hamcrestVersion = '3.0'
         xmlbeansVersion = '5.3.0'
         batikVersion = '1.19'