Bump mockito-version from 5.20.0 to 5.21.0

Bumps `mockito-version` from 5.20.0 to 5.21.0.

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

Updates `org.mockito:mockito-junit-jupiter` from 5.20.0 to 5.21.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@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
- 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]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ unirest-version = "4.0.0-RC2"
 lombok-version = "1.18.42"
 junitVersion = "6.0.1"
 assertj-core-version = "3.27.6"
-mockito-version = "5.20.0"
+mockito-version = "5.21.0"
 
 shadow-version = "9.3.0"
 jib-version = "3.5.1"