Bump org.mockito:mockito-bom from 5.20.0 to 5.21.0

Bumps [org.mockito:mockito-bom](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-bom
  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

@@ -85,7 +85,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>11</java.version>
     <org.junit.version>5.13.4</org.junit.version>
-    <org.mockito.version>5.20.0</org.mockito.version>
+    <org.mockito.version>5.21.0</org.mockito.version>
     <org.slf4j.version>2.0.17</org.slf4j.version>
     <org.apache.commons.collections.version>4.5.0</org.apache.commons.collections.version>
     <org.apache.commons.lang.version>3.20.0</org.apache.commons.lang.version>