chore(deps-dev): bump org.mockito:mockito-core in /sdk/java

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.6.0 to 5.8.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.6.0...v5.8.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

sdk/java/pom.xml

@@ -257,7 +257,7 @@
         <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>
         <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
         <maven-versions-plugin.version>2.16.0</maven-versions-plugin.version>
-        <mockito-core.version>5.6.0</mockito-core.version>
+        <mockito-core.version>5.8.0</mockito-core.version>
         <slf4j-api.version>2.0.0</slf4j-api.version>
         <slf4j-simple.version>2.0.7</slf4j-simple.version>
         <smallrye-graphql.version>2.5.1</smallrye-graphql.version>