Update mockito monorepo to v5.21.0 (#86)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

parent_toplevel/pom.xml

@@ -84,7 +84,7 @@
     <site.deploy.url>scm:git:https://github.com/wcm-io-devops/wcm-io-devops.github.io.git</site.deploy.url>
 
     <!-- Versions -->
-    <mockito.version>5.20.0</mockito.version>
+    <mockito.version>5.21.0</mockito.version>
 
     <!-- SonarCloud -->
     <sonar.organization>wcm-io-devops</sonar.organization>