Bump org.mockito:mockito-core from 5.20.0 to 5.21.0 (#12)

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
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -29,7 +29,7 @@ dependencies {
     testImplementation("org.glassfish.jersey.containers:jersey-container-servlet:${jerseyVersion}")
     testImplementation("org.glassfish.jersey.inject:jersey-hk2:${jerseyVersion}")
     testImplementation("org.glassfish.jersey.media:jersey-media-json-jackson:${jerseyVersion}")
-    testImplementation("org.mockito:mockito-core:5.20.0")
+    testImplementation("org.mockito:mockito-core:5.21.0")
     testImplementation("org.slf4j:slf4j-simple:2.0.17")
     testImplementation("org.wiremock:wiremock-jetty12:3.13.2")
 }