deps: bump org.mockito:mockito-core from 5.7.0 to 5.21.0

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.7.0 to 5.21.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.7.0...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>

Author: dependabot[bot]

pom.xml

@@ -40,7 +40,7 @@
 
         <!-- Test dependency versions -->
         <junit.version>5.10.1</junit.version>
-        <mockito.version>5.7.0</mockito.version>
+        <mockito.version>5.21.0</mockito.version>
         <testcontainers.version>1.19.3</testcontainers.version>
         <opentelemetry.version>1.34.0</opentelemetry.version>
     </properties>