Bump mockito.version from 5.18.0 to 5.21.0

Bumps `mockito.version` from 5.18.0 to 5.21.0.

Updates `org.mockito:mockito-core` from 5.18.0 to 5.21.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.21.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.18.0 to 5.21.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.21.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-version: 5.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-version: 5.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

capabilities-parent/pom.xml

@@ -37,7 +37,7 @@
         <junit-jupiter.version>5.13.4</junit-jupiter.version>
         <oauth2-oidc-sdk.version>11.33</oauth2-oidc-sdk.version>
         <langchain4j.version>1.10.0</langchain4j.version>
-        <mockito.version>5.18.0</mockito.version>
+        <mockito.version>5.21.0</mockito.version>
         <jacoco-maven-plugin.version>0.8.14</jacoco-maven-plugin.version>
         <spotless-maven-plugin.version>3.2.1</spotless-maven-plugin.version>
         <palantir-format-version.version>2.71.0</palantir-format-version.version>