build(deps): bump org.mockito:mockito-core from 5.20.0 to 5.21.0 (#405)

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](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
...

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

Author: dependabot[bot]

build.gradle

@@ -25,7 +25,7 @@ dependencies {
 	// ***** TEST DEPENDENCIES *****
 	testImplementation('org.junit.jupiter:junit-jupiter-api:6.0.1')
 	testRuntimeOnly('org.junit.jupiter:junit-jupiter-engine:6.0.1')
-	testImplementation('org.mockito:mockito-core:5.20.0')
+	testImplementation('org.mockito:mockito-core:5.21.0')
 }
 
 application {