Bump mockito.version from 5.20.0 to 5.21.0

Bumps `mockito.version` from 5.20.0 to 5.21.0.

Updates `org.mockito:mockito-bom` 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)

Updates `org.mockito:mockito-errorprone` 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
- dependency-name: org.mockito:mockito-errorprone
  dependency-version: 5.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -64,7 +64,7 @@
     <!-- Project Test Dependencies Configuration -->
     <equalsverifier.version>4.2.5</equalsverifier.version>
     <junit.version>6.0.1</junit.version>
-    <mockito.version>5.20.0</mockito.version>
+    <mockito.version>5.21.0</mockito.version>
     <assertj.version>3.27.6</assertj.version>
     <archunit.version>1.4.1</archunit.version>